implement or_gate wuclass #72
or_gate wuclass implemented #74
Merge branch '74_implement_or_gate_wuclass' of github.com:wukong-m2m/wukong-darjeeling into 74_implement_or_gate_wuclass

Conflicts:
	wukong/ComponentDefinitions/WuKongStandardLibrary.xml
	wukong/javax/wukong/virtualwuclasses/VirtualOrGateWuObject.java
not gate implemented #75
Merge pull request #77 from wukong-m2m/75_implement_not_gate_wuclass

75 implement not gate wuclass