Document Yesod.Form.Bootstrap3
Revision 1 of Bootstrap 3 documentation
Fix usages of bootstrapSubmit
Improves code formatting

* Fixes bug where @<button>@ was being treated as a Haskell function reference
* Uses '<*' instead of @<*@, since <* is a Haskell function (though this doesn't appear to make the link work)
Merge pull request #873 from MaxGabriel/documentBootstrap3

Document Yesod.Form.Bootstrap3