implemented example signal/slot connection with parameters of type QImage and GoBoard
added a comment clarifying why passing a pointer to the GoBoard is safe
refs #31 - prototyped some slots for the backend
added an example how to get the information the gui needs out of a GoBoard
refs #31 - cleaned up, commented and added resign function to backend thread
refs #31 - removed a remnant of some debug code and cleaned up
Merge branch 'master' into #31_backend_gui_communication

Conflicts:
	Go_GUI/GUI.hpp
fixed switch statement
Merge pull request #44 from augmented-go/#31_backend_gui_communication

closes #31 backend gui communication