Added signing configs.
Replaced JetBrains annotations with android support annotations.
Rewritten ActivityMonitor.
Refactored Settings.
Fixed some inspections stuff. Fixed some settings weren't updated.
Refactored preference keys. Removed Apperarance preference from Settings.
Added missing NavUtils calls.
Fixed FileObserver issues
Added StructMode. Updated BUGS.
Fixed some notifyDataSetChanged issues.
Changed file copy and move algorithm. Added "Write into" FileExistsDialog feature.
Removed OperationTasks.
Fixed MediaStoreUtils issues when replacing files.
Fixed MediaStoreUtils issues when replacing files.