Update build.xml, make some folders not obligatory for JS apps
Update build.xml, make some folders not obligatory for JS apps

Folders 'models', 'model_views', 'collections', 'collection_views'
not obligatory for JavaScript applications any more.

Mibew/tray,Mibew/tray,Mibew/java,Mibew/tray,Mibew/java,Mibew/tray,Mibew/tray,Mibew/java,Mibew/java,Mibew/java,Mibew/java,Mibew/tray