Remove support for html/body elems as sscontainer and fix firefox bug #…

…171

Add a newContent check to allow for fallback

Update documentation and version

Add support for forms.

Merge pull request #168 from miguel-perez/add-cache-invalidation

Add cache invalidation #51

#105: refarctor html document extraction.

Update version number

Update smoothState.jquery.json

Update smoothState.jquery.json

#24: Prevent canceled requests from fetching