Fixed and successfully tested gametree code.

Added a proper test for the gametree code to test equivilence with
a standard gameboard after multiple traversals.
Still need to implement freeing of discarded tree branches after a traversal.
 On branch dev_ben
 Changes to be committed:

	modified:   README.md
	modified:   src/gt.c
	modified:   src/main.c
Removed unnessecery printf's