Buttons

class
Merge branch 'master' of https://github.com/ZiyiZhao/Straight_GUI

Conflicts:
StraightGUI/view.cc
StraightGUI/view.h
Merge branch 'master' of https://github.com/ZiyiZhao/Straight_GUI

Conflicts:
	StraightGUI/view.cc
	StraightGUI/view.h