Changed response ID to be two bytes.

closes #71
Merge remote-tracking branch 'origin/master'
Go back to 1 byte for response data.

At least the code got some cleaning up. :)
#71
Changed response hash map to array.
Fixed abandoned response, with test.

closes #71
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/com/esotericsoftware/kryonet/rmi/ObjectSpace.java