Add "file2raw" transform to HTML form wrapper

When invoked, it translates HTML file uploads into RESTful requests.
Implement documentation upload form
Add --reinstall option to build client

This lets us regenerate documentation when dependencies are updated.
Merge branch 'master' into doc-upload-form

Conflicts:
	Distribution/Server/Features/Html.hs
	Distribution/Server/Util/Happstack.hs
Merge pull request #229 from lfairy/doc-upload-form

Add a documentation upload form