Issue #2389061 by slashrsm: Fix typo in __sleep() and make sure only one object is subscribed to events.
Merge pull request #39 from slashrsm/2389061_caching

Issue #2389061 by slashrsm: Fix typo in __sleep() and make sure only one...
2291249 implementing Modal display
2291249 removed debug code
2291249 removed commented out code
2991249 added DisplayAjaxInterface
2291249 changed variable
2291249 removed unneeded classes
2291249 implementing Modal display
2291249 removed debug code
2291249 removed commented out code
2991249 added DisplayAjaxInterface
2291249 changed variable
2291249 override FormAjaxController to get modal display working
2291249 removed debug code
2291249 only add custon event to link once
2291249 override FormAjaxController only for entity browser
2291249 fixed whitespace
2291249 moved DisplayRouterInterface to src root
2291249 fixed whitespace