Remove lodash dependency, update sauce config to use mockfirebase in bower

Author: katowulf

tests/automatic_karma.conf.js

@@ -17,7 +17,6 @@ module.exports = function(config) {
     },
 
     files: [
-      '../bower_components/lodash/dist/lodash.js',
       '../bower_components/angular/angular.js',
       '../bower_components/angular-mocks/angular-mocks.js',
       '../bower_components/mockfirebase/dist/mockfirebase.js',

tests/sauce_karma.conf.js

@@ -20,7 +20,7 @@ module.exports = function(config) {
     files: [
       '../bower_components/angular/angular.js',
       '../bower_components/angular-mocks/angular-mocks.js',
-      '../bower_components/lodash/dist/lodash.js',
+      '../bower_components/mockfirebase/dist/mockfirebase.js',
       'lib/**/*.js',
       '../dist/angularfire.js',
       'mocks/**/*.js',

tests/unit/firebase.spec.js

@@ -207,7 +207,7 @@ describe('$firebase', function () {
       $fb.$set({hello: 'world'});
       ref.flush();
       var args = ref.ref().update.calls.mostRecent().args[0];
-      expect(_.keys(args)).toEqual(['hello'].concat(expKeys));
+      expect(Object.keys(args)).toEqual(['hello'].concat(expKeys));
     });
   });