Allow spaces in tags

Fixes #4

I've also done some (manual) testing of things like commas, other punctuation,
cyrillic and chinese characters.

It would be good (but low-priority) to write a few proper tests for awkward tag contents.

drupal_annotation/annotation.store.inc

@@ -167,7 +167,6 @@ function annotation_api_search() {
   $quote   = isset($_GET['quote'])   ? $_GET['quote']      : NULL;
   $uri     = isset($_GET['uri'])     ? $_GET['uri']        : NULL;
   $nid     = isset($_GET['nid'])     ? $_GET['nid']        : NULL;
-  $tags    = isset($_GET['tags'])    ? explode(',', $tags) : NULL;
 
   // Initiate query
   $query = new EntityFieldQuery();

drupal_annotator/js/annotator_tags.js

@@ -6,11 +6,25 @@
 	  if(Drupal.settings.autocomplete_terms.indexOf(annotation.tags[i]) == -1){
 	      Drupal.settings.autocomplete_terms.push(annotation.tags[i]);
 	      }
+
       }
       }
   Drupal.behaviors.annotatorTags = {
     attach: function (context, settings) {
       Drupal.Annotator.annotator('addPlugin', 'Tags', {
+
+      parseTags: function(string) {
+	return [$.trim(string)];
+      },
+      stringifyTags: function(array) {
+	  if(array.length > 1){
+	      console.log('stringifyTags unexpectedly received multiple tags: ');
+	      console.log(array);
+	      }
+        return array.join(",");
+      },
+
+
         onInit: function(that){
 	  that.annotator.subscribe('annotationEditorSubmit', add_tags_to_autocomplete)
 	  jQuery(that.field).find(':input').autocomplete({