Centralize irrelevant types tests.
Fix additionalProperties with patternProperties present.

Closes #24.
Don't recommend using version.

It is imminently going to be deprecated.
Fix additionalItems behavior when items is not in tuple form.
Merge branch 'master' into additionalItems_fix

Conflicts:
	tests.py
Fix bad merge.
Fix another merge problem.
Minor formatting.
Merge branch 'master' into pointer_ref