Completed Invalidate and added throws ValidationException
Completed Invalidate and added throws ValidationException
Completed Invalidate and added throws ValidationException
Completed Invalidate and added throws ValidationException
Completed Invalidate and added throws ValidationException
Completed Invalidate and added throws ValidationException
Completed Invalidate and added throws ValidationException
Merge origin/master

Conflicts:
	src/truthtablegenerator/Expression.java
	src/truthtablegenerator/Table.java