Performance tunning, content loading animation

- have added loading animation while ajax works (tab switching)
- have tuned Model using jprofiler
- turned off debug ( consumes 20% of execution time !!! )
- have added createdBy calculable property to EntityObject (orm) to
fetch created_by along with other object fields ( in table )
- have moved calculating of navigationPathItems from lightLoad to load
method (load method fetches all data about object, light - only row from
objects table and createdBy)
- loadAll method is awful if you want to load list for view. It fetches
all params. Use lightLoadAll instead