Barak Itkin authored Aug 15, 2011 and Michael Natterer committed May 15, 2013

Unreffing the tilemanager of a GimpBuffer is wrong, since the function
to get the tilemanager of a buffer doesn't ref it.
Also, the operation of the tool can now be saved ("committed") using
the Enter key, and the tool can be halted using the Escape key. Note
however that we should do these in a nicer way, that does not require
restarting the tool to use it afterwards.
Finally, this commit removes the debug printing.