* Separated Admin Controller into a generic and extendable Base controller. Added Autoload for properly loading classes
* Implemented custom class loader to force lowercase
* Removed composer autoloader for classes
* Updates
* Ability to pass custom upload URL for files
* Added new onAdminCanSave event for 3rd party plugins
* Moved files upload GC in onOutputGenerated event
* Cleanup
* Moved autoloader so it is always registering
* Fixed onOutputGenerated event location
* Moved `taskRemoveFileFromBlueprint`, `taskRemoveMedia `, `canEditMedia` methods to admin base controller
* Allow to globally define `blueprint_type` and `file_url_remove` for the file field
* Moved `isMultilang()` into base controller
* Properly generate thumbnails in proportions for file fields
* Simplified execute restrictions with blacklist
Adds a new notifications feature to the Admin plugin. It will now lookup notifications which are set up on getgrav.org and will inform users, and also alert for new updates and provide awareness on various topics.
Also fixes issue with Array field in `value_only` mode, improperly displaying the key when novalue was set, and fixes issue with drag handlers in Array not showing/hiding properly (#950)
Updated FontAwesome to 4.6.3
