URL encode branch for circle badge

Author: sfackler

app/components/badge-circle-ci.js

@@ -5,7 +5,7 @@ export default Ember.Component.extend({
     classNames: ['badge'],
     repository: Ember.computed.alias('badge.attributes.repository'),
     branch: Ember.computed('badge.attributes.branch', function() {
-        return this.get('badge.attributes.branch') || 'master';
+        return encodeURIComponent(this.get('badge.attributes.branch')) || 'master';
     }),
     text: Ember.computed('branch', function() {
         return `Circle CI build status for the ${ this.get('branch') } branch`;