Allow string input on regexp validator

This would be very useful because it would allow conversion of a RegExp object AFTER it is transferred in JSON format.
Allow string input on regexp validator; Included tests
Merge branch 'master' of git://github.com/gregsabia/backbone-forms into gregsabia-master
Readme
Build
Add match parameter regexp validation
Match validation test
Match option fail test
Fix bootstrap3 class list name. Closes #329
Readme
Merge branch 'master' of git://github.com/ping86/backbone-forms into ping86-master
Fix tests
Build and docs
Make templating radio editor easier
Use _.result for getting schema
Allow templates field and fieldset templates to be passed through prototype; improves Form.extend capabilities
Add npm test script
Remove global vars in test
Allow specifying fieldsets on Form.prototype
Fix docs example