Rename 'table' classes to 'map'
Added a little doc
Removed unused variable
Improved the code

- Removed some synchronized(this)
- Changed a for(;;) for a Map.Entry iteration
- Changed some compareTo for equals
Adds statys-by-key command
Renamed variable
Addded status-by-requests and status-by-grants commands
Updated docs
General improvements of codebase

- Refactored the way LockHandle, LockRequestTimeout and LockHandleTimeout release or cancel a lock
- Added unit test for request timeout
Extracted lock handle initialization to a method
Improved the way the list of keys is returned from the lock engine. The hash map of keys wont be locked during sorting