Update key schema docs...

The existing wording was confusing over what exactly was getting validated
(keys vs values).
Merge pull request #37 from ch3pjw/update_keyschema_docs

Update key schema docs...
Release note for regex rule.
Validator class release notes updated
Python 3.4
tox support
README update for tox and Py34
Paul Weaver
0.7 release date
trove classifiers fix
Bump version to 0.7.1
Options passed to nested validators. Closes #40.
flake8
Make self.document always the root document
Add documentation for self.document
Add test for self.document is root
Improve self.document

Add 'versionadded' tag and move _new-types back to proper place.
Make self.document always the root document.
Merge branch 'joshvillbrandt-master'
Remove passing of bogus schema on keyschema validator construction