modified .gitignore to contain everything necessary

.gitignore

@@ -5,4 +5,13 @@ __*
 # ignore the phpstorm project dir
 .idea/
 # do not ignore the registered directory
-!__registered/
+!__registered/
+# ignore the developer dir
+developer/
+# ignore jstree/jquery/ui
+jstree/jquery/ui
+# do not ignore the necessary stuff for jqueryui
+!jstree/jquery/ui/ui.js
+!jstree/jquery/ui/ui.css
+!jstree/jquery/ui/localize.js
+!jstree/jquery/ui/images/