Fixes #6213 - Explicitly deprecated ElggMenuItem::factory 'class' key and adds BC
Added jquery map file and unminified version to make Chrome dev tools happy and not throw 404 error
Merge pull request #6215 from Srokap/jquery_map

Ease debugging jQuery in Source Map-compatible debuggers
Merge pull request #6216 from Srokap/ticket_6213

Fixes #6213 - Deprecates ElggMenuItem::factory 'class' key and adds BC