feat(helpers): add general ui class helpers

See the following Bulma page for original information on the classes that are being integrated:
http://bulma.io/documentation/modifiers/helpers/

Author: alexdiliberto

addon/.gitkeep

@@ -1,7 +1,7 @@
 import Ember from 'ember';
 import layout from '../templates/components/bulma-button';
 import { alias, bool } from 'ember-decorators/object/computed';
-import { _colorBindings } from '../constants';
+import { _colorBindings, _helpers } from '../constants';
 
 const {
   Component
@@ -11,7 +11,7 @@ export default Component.extend({
   layout,
   tagName: 'a',
   classNames: ['button'],
-  classNameBindings: ['isLoading:is-loading', 'loading:is-loading', 'isOutlined:is-outlined', 'outlined:is-outlined', 'isFullwidth:is-fullwidth', 'isFullWidth:is-fullwidth', 'isInverted:is-inverted', 'inverted:is-inverted'].concat(_colorBindings),
+  classNameBindings: ['isLoading:is-loading', 'loading:is-loading', 'isOutlined:is-outlined', 'outlined:is-outlined', 'isFullwidth:is-fullwidth', 'isFullWidth:is-fullwidth', 'isInverted:is-inverted', 'inverted:is-inverted'].concat(_colorBindings, _helpers),
   attributeBindings: ['disabled'],
 
   /**

addon/components/bulma-button.js

@@ -1,6 +1,6 @@
 import Ember from 'ember';
 import layout from '../templates/components/bulma-column';
-import { _responsiveHelpers, _gridBindings } from '../constants';
+import { _helpers, _responsiveHelpers, _gridBindings } from '../constants';
 
 const {
   Component,
@@ -20,7 +20,7 @@ export default Component.extend({
     @private
   */
   concatBindings() {
-    set(this, 'classNameBindings', ['content'].concat(_gridBindings, _responsiveHelpers));
+    set(this, 'classNameBindings', ['content'].concat(_gridBindings, _responsiveHelpers, _helpers));
   },
 
   init() {

addon/components/bulma-column.js

@@ -1,6 +1,6 @@
 import Ember from 'ember';
 import layout from '../templates/components/bulma-columns';
-import { _responsiveHelpers } from '../constants';
+import { _helpers, _responsiveHelpers } from '../constants';
 
 const {
   Component
@@ -17,5 +17,5 @@ export default Component.extend({
     'isMultiline:is-multiline',
     'isGapless:is-gapless',
     'isVcentered:is-vcentered'
-  ].concat(_responsiveHelpers)
+  ].concat(_helpers, _responsiveHelpers)
 });

addon/components/bulma-columns.js

@@ -1,6 +1,6 @@
 import Ember from 'ember';
 import layout from '../templates/components/bulma-container';
-import { _responsiveHelpers } from '../constants';
+import { _helpers, _responsiveHelpers } from '../constants';
 
 const {
   Component
@@ -9,5 +9,5 @@ const {
 export default Component.extend({
   layout,
   classNames: ['container'],
-  classNameBindings: ['isFluid:is-fluid'].concat(_responsiveHelpers)
+  classNameBindings: ['isFluid:is-fluid'].concat(_helpers, _responsiveHelpers)
 });

addon/components/bulma-container.js

@@ -1,5 +1,6 @@
 import Ember from 'ember';
 import layout from '../templates/components/bulma-control';
+import { _helpers } from '../constants';
 
 const {
   Component
@@ -20,5 +21,5 @@ export default Component.extend({
     'isGroup:is-group',
     'isExpanded:is-expanded',
     'isHorizontal:is-horizontal'
-  ]
+  ].concat(_helpers)
 });

addon/components/bulma-control.js

@@ -1,6 +1,6 @@
 import Ember from 'ember';
 import layout from '../templates/components/bulma-footer';
-import { _responsiveHelpers } from '../constants';
+import { _helpers, _responsiveHelpers } from '../constants';
 
 const {
   Component
@@ -10,5 +10,5 @@ export default Component.extend({
   layout,
   tagName: 'footer',
   classNames: ['footer'],
-  classNameBindings: _responsiveHelpers
+  classNameBindings: [].concat(_helpers, _responsiveHelpers)
 });

addon/components/bulma-footer.js

@@ -1,6 +1,6 @@
 import Ember from 'ember';
 import layout from '../templates/components/bulma-header-menu';
-import { _responsiveHelpers } from '../constants';
+import { _helpers, _responsiveHelpers } from '../constants';
 
 const {
   Component,
@@ -15,7 +15,7 @@ export default Component.extend({
     'isRight:header-right',
     'left:header-left',
     'right:header-right'
-  ].concat(_responsiveHelpers),
+  ].concat(_helpers, _responsiveHelpers),
   /**
     Array of links for this menu
 

addon/components/bulma-header-menu.js

@@ -1,6 +1,6 @@
 import Ember from 'ember';
 import layout from '../templates/components/bulma-header';
-import { _responsiveHelpers } from '../constants';
+import { _helpers, _responsiveHelpers } from '../constants';
 
 const {
   Component
@@ -10,5 +10,5 @@ export default Component.extend({
   layout,
   tagName: 'header',
   classNames: ['header'],
-  classNameBindings: _responsiveHelpers
+  classNameBindings: [].concat(_helpers, _responsiveHelpers)
 });

addon/components/bulma-header.js

@@ -1,7 +1,7 @@
 import Ember from 'ember';
 import layout from '../templates/components/bulma-hero-content';
 import { alias } from 'ember-decorators/object/computed';
-import { _responsiveHelpers } from '../constants';
+import { _helpers, _responsiveHelpers } from '../constants';
 
 const {
   Component
@@ -12,7 +12,7 @@ export default Component.extend({
   classNames: ['hero-body'],
   classNameBindings: [
     'full:is-fullwidth'
-  ].concat(_responsiveHelpers),
+  ].concat(_helpers, _responsiveHelpers),
 
   /**
     Signal if is-fluid should be added to the outer container