Add utilities to help with schema-based validation
A bit of sugar for validators

We can probably do more here - maybe something along the lines of
schema's defrecord? - but I'm excited to move on to something new
Update .gitignore
add some scary warnings
Merge branch 'master' into validator

Conflicts:
	.gitignore
Merge pull request #6 from travis/validator

Add support for using prismatic schemas to validate parse objects