Constraints not working. Giving null pointer error that I can't seem to
run down.
Merge branch 'master' into constraints
Merge branch 'master' into constraints
Merge branch 'master' into constraints
Merge branch 'master' into constraints
Merge branch 'master' into constraints

Conflicts:
	src/solutions/Solution.java
Fixed uninitialized ConstraintSet.
Individual variable constraints are functional.