added button resign,
signal and slots for buttons,
attached signals to slots in backend
#37:
added button resign,
signal and slots for buttons,
attached signals to slots in backend
Revert "#37:"

This reverts commit 1b373bc50134a05bd3ac34d7cc0e4a471f8ba44a.
untabified
Merge pull request #57 from augmented-go/#37_GUI_resign

#37 gui resign