refactor(autocomplete): Changed load function call

Refactored the load function call so it complies with Angular guidelines
on invocation of expression properties. A $text parameter is now passed
to the provided expression.

Closes #18.

src/auto-complete.js

@@ -33,7 +33,7 @@ angular.module('tags-input').directive('autoComplete', function($document) {
  return;
  }
 
- loadFn(text).then(function(items) {
+ loadFn({ $text: text }).then(function(items) {
  self.items = items;
  if (items.length > 0) {
  self.show();
@@ -76,7 +76,7 @@ angular.module('tags-input').directive('autoComplete', function($document) {
  '</div>',
  link: function(scope, element, attrs, tagsInputCtrl) {
  var hotkeys = [KEYS.enter, KEYS.tab, KEYS.escape, KEYS.up, KEYS.down],
- suggestionList = new SuggestionList(scope.source()),
+ suggestionList = new SuggestionList(scope.source),
 
  tagsInput = tagsInputCtrl.registerAutocomplete(),
  input = tagsInput.input;

test/auto-complete.spec.js

@@ -39,7 +39,7 @@ describe('autocomplete-directive', function () {
 
  spyOn(parentCtrl, 'registerAutocomplete').andReturn(tagsInput);
 
- element = angular.element('<auto-complete source="loadItems"></auto-complete>');
+ element = angular.element('<auto-complete source="loadItems($text)"></auto-complete>');
  parent.append(element);
 
  $compile(element)($scope);