Handle nil and NSNull instances more consistently
Remove extra newlines
Prioritize instance method over class method. Document and unit test new function
Remove extra newline
Fix nil/null error message localizable keys
Merge pull request #15 from twotoasters/consistently-handle-nil-nsnull

Consistently handle values that are nil and NSNull
Merge pull request #17 from twotoasters/kvcvalidator-instance-method

Add ability to specify validators via instance method
Merge pull request #18 from twotoasters/consistently-handle-nil-nsnull

Consistently handle nil nsnull
Interim commit
Finish implementation of value set validator. Create test file (with no tests)
Add unit tests and documentation
Merge pull request #19 from twotoasters/set-membership-validator

Add value set validator
Test collection and keyed collection and selector/protocol conformance
Reword some documentation
Merge pull request #21 from twotoasters/collection-conformance

Collection/keyed collection conformance
Merge branch 'master' into string-convenience
added wildcard matching methods to string validation