--- a
+++ b/front-end/ladda.js
@@ -0,0 +1,412 @@
+/*!
+ * Ladda
+ * http://lab.hakim.se/ladda
+ * MIT licensed
+ *
+ * Copyright (C) 2014 Hakim El Hattab, http://hakim.se
+ */
+/* jshint node:true, browser:true */
+(function( root, factory ) {
+
+	// CommonJS
+	if( typeof exports === 'object' )  {
+		module.exports = factory(require('spin.js'));
+	}
+	// AMD module
+	else if( typeof define === 'function' && define.amd ) {
+		define( [ 'spin' ], factory );
+	}
+	// Browser global
+	else {
+		root.Ladda = factory( root.Spinner );
+	}
+
+}
+(this, function( Spinner ) {
+	'use strict';
+
+	// All currently instantiated instances of Ladda
+	var ALL_INSTANCES = [];
+
+	/**
+	 * Creates a new instance of Ladda which wraps the
+	 * target button element.
+	 *
+	 * @return An API object that can be used to control
+	 * the loading animation state.
+	 */
+	function create( button ) {
+
+		if( typeof button === 'undefined' ) {
+			console.warn( "Ladda button target must be defined." );
+			return;
+		}
+
+		// The text contents must be wrapped in a ladda-label
+		// element, create one if it doesn't already exist
+		if( !button.querySelector( '.ladda-label' ) ) {
+			button.innerHTML = '<span class="ladda-label">'+ button.innerHTML +'</span>';
+		}
+
+		// The spinner component
+		var spinner;
+
+		// Wrapper element for the spinner
+		var spinnerWrapper = document.createElement( 'span' );
+		spinnerWrapper.className = 'ladda-spinner';
+		button.appendChild( spinnerWrapper );
+
+		// Timer used to delay starting/stopping
+		var timer;
+
+		var instance = {
+
+			/**
+			 * Enter the loading state.
+			 */
+			start: function() {
+
+				// Create the spinner if it doesn't already exist
+				if( !spinner ) spinner = createSpinner( button );
+
+				button.setAttribute( 'disabled', '' );
+				button.setAttribute( 'data-loading', '' );
+
+				clearTimeout( timer );
+				spinner.spin( spinnerWrapper );
+
+				this.setProgress( 0 );
+
+				return this; // chain
+
+			},
+
+			/**
+			 * Enter the loading state, after a delay.
+			 */
+			startAfter: function( delay ) {
+
+				clearTimeout( timer );
+				timer = setTimeout( function() { instance.start(); }, delay );
+
+				return this; // chain
+
+			},
+
+			/**
+			 * Exit the loading state.
+			 */
+			stop: function() {
+
+				button.removeAttribute( 'disabled' );
+				button.removeAttribute( 'data-loading' );
+
+				// Kill the animation after a delay to make sure it
+				// runs for the duration of the button transition
+				clearTimeout( timer );
+
+				if( spinner ) {
+					timer = setTimeout( function() { spinner.stop(); }, 1000 );
+				}
+
+				return this; // chain
+
+			},
+
+			/**
+			 * Toggle the loading state on/off.
+			 */
+			toggle: function() {
+
+				if( this.isLoading() ) {
+					this.stop();
+				}
+				else {
+					this.start();
+				}
+
+				return this; // chain
+
+			},
+
+			/**
+			 * Sets the width of the visual progress bar inside of
+			 * this Ladda button
+			 *
+			 * @param {Number} progress in the range of 0-1
+			 */
+			setProgress: function( progress ) {
+
+				// Cap it
+				progress = Math.max( Math.min( progress, 1 ), 0 );
+
+				var progressElement = button.querySelector( '.ladda-progress' );
+
+				// Remove the progress bar if we're at 0 progress
+				if( progress === 0 && progressElement && progressElement.parentNode ) {
+					progressElement.parentNode.removeChild( progressElement );
+				}
+				else {
+					if( !progressElement ) {
+						progressElement = document.createElement( 'div' );
+						progressElement.className = 'ladda-progress';
+						button.appendChild( progressElement );
+					}
+
+					progressElement.style.width = ( ( progress || 0 ) * button.offsetWidth ) + 'px';
+				}
+
+			},
+
+			enable: function() {
+
+				this.stop();
+
+				return this; // chain
+
+			},
+
+			disable: function () {
+
+				this.stop();
+				button.setAttribute( 'disabled', '' );
+
+				return this; // chain
+
+			},
+
+			isLoading: function() {
+
+				return button.hasAttribute( 'data-loading' );
+
+			},
+
+			remove: function() {
+
+				clearTimeout( timer );
+
+				button.removeAttribute( 'disabled', '' );
+				button.removeAttribute( 'data-loading', '' );
+
+				if( spinner ) {
+					spinner.stop();
+					spinner = null;
+				}
+
+				for( var i = 0, len = ALL_INSTANCES.length; i < len; i++ ) {
+					if( instance === ALL_INSTANCES[i] ) {
+						ALL_INSTANCES.splice( i, 1 );
+						break;
+					}
+				}
+
+			}
+
+		};
+
+		ALL_INSTANCES.push( instance );
+
+		return instance;
+
+	}
+
+	/**
+	* Get the first ancestor node from an element, having a
+	* certain type.
+	*
+	* @param elem An HTML element
+	* @param type an HTML tag type (uppercased)
+	*
+	* @return An HTML element
+	*/
+	function getAncestorOfTagType( elem, type ) {
+
+		while ( elem.parentNode && elem.tagName !== type ) {
+			elem = elem.parentNode;
+		}
+
+		return ( type === elem.tagName ) ? elem : undefined;
+
+	}
+
+	/**
+	 * Returns a list of all inputs in the given form that
+	 * have their `required` attribute set.
+	 *
+	 * @param form The from HTML element to look in
+	 *
+	 * @return A list of elements
+	 */
+	function getRequiredFields( form ) {
+
+		var requirables = [ 'input', 'textarea' ];
+		var inputs = [];
+
+		for( var i = 0; i < requirables.length; i++ ) {
+			var candidates = form.getElementsByTagName( requirables[i] );
+			for( var j = 0; j < candidates.length; j++ ) {
+				if ( candidates[j].hasAttribute( 'required' ) ) {
+					inputs.push( candidates[j] );
+				}
+			}
+		}
+
+		return inputs;
+
+	}
+
+
+	/**
+	 * Binds the target buttons to automatically enter the
+	 * loading state when clicked.
+	 *
+	 * @param target Either an HTML element or a CSS selector.
+	 * @param options
+	 *          - timeout Number of milliseconds to wait before
+	 *            automatically cancelling the animation.
+	 */
+	function bind( target, options ) {
+
+		options = options || {};
+
+		var targets = [];
+
+		if( typeof target === 'string' ) {
+			targets = toArray( document.querySelectorAll( target ) );
+		}
+		else if( typeof target === 'object' && typeof target.nodeName === 'string' ) {
+			targets = [ target ];
+		}
+
+		for( var i = 0, len = targets.length; i < len; i++ ) {
+
+			(function() {
+				var element = targets[i];
+
+				// Make sure we're working with a DOM element
+				if( typeof element.addEventListener === 'function' ) {
+					var instance = create( element );
+					var timeout = -1;
+
+					element.addEventListener( 'click', function( event ) {
+
+						// If the button belongs to a form, make sure all the
+						// fields in that form are filled out
+						var valid = true;
+						var form = getAncestorOfTagType( element, 'FORM' );
+
+						if( typeof form !== 'undefined' ) {
+							var requireds = getRequiredFields( form );
+							for( var i = 0; i < requireds.length; i++ ) {
+								// Alternatively to this trim() check,
+								// we could have use .checkValidity() or .validity.valid
+								if( requireds[i].value.replace( /^\s+|\s+$/g, '' ) === '' ) {
+									valid = false;
+								}
+							}
+						}
+
+						if( valid ) {
+							// This is asynchronous to avoid an issue where setting
+							// the disabled attribute on the button prevents forms
+							// from submitting
+							instance.startAfter( 1 );
+
+							// Set a loading timeout if one is specified
+							if( typeof options.timeout === 'number' ) {
+								clearTimeout( timeout );
+								timeout = setTimeout( instance.stop, options.timeout );
+							}
+
+							// Invoke callbacks
+							if( typeof options.callback === 'function' ) {
+								options.callback.apply( null, [ instance ] );
+							}
+						}
+
+					}, false );
+				}
+			})();
+
+		}
+
+	}
+
+	/**
+	 * Stops ALL current loading animations.
+	 */
+	function stopAll() {
+
+		for( var i = 0, len = ALL_INSTANCES.length; i < len; i++ ) {
+			ALL_INSTANCES[i].stop();
+		}
+
+	}
+
+	function createSpinner( button ) {
+
+		var height = button.offsetHeight,
+			spinnerColor;
+
+		if( height === 0 ) {
+			// We may have an element that is not visible so
+			// we attempt to get the height in a different way
+			height = parseFloat( window.getComputedStyle( button ).height );
+		}
+
+		// If the button is tall we can afford some padding
+		if( height > 32 ) {
+			height *= 0.8;
+		}
+
+		// Prefer an explicit height if one is defined
+		if( button.hasAttribute( 'data-spinner-size' ) ) {
+			height = parseInt( button.getAttribute( 'data-spinner-size' ), 10 );
+		}
+
+		// Allow buttons to specify the color of the spinner element
+		if( button.hasAttribute( 'data-spinner-color' ) ) {
+			spinnerColor = button.getAttribute( 'data-spinner-color' );
+		}
+
+		var lines = 12,
+			radius = height * 0.2,
+			length = radius * 0.6,
+			width = radius < 7 ? 2 : 3;
+
+		return new Spinner( {
+			color: spinnerColor || '#fff',
+			lines: lines,
+			radius: radius,
+			length: length,
+			width: width,
+			zIndex: 'auto',
+			top: 'auto',
+			left: 'auto',
+			className: ''
+		} );
+
+	}
+
+	function toArray( nodes ) {
+
+		var a = [];
+
+		for ( var i = 0; i < nodes.length; i++ ) {
+			a.push( nodes[ i ] );
+		}
+
+		return a;
+
+	}
+
+	// Public API
+	return {
+
+		bind: bind,
+		create: create,
+		stopAll: stopAll
+
+	};
+
+}));