Includes minor bugfixes to the Thingy, HTTP Proxy, Wiki, SQL Form, and Matrix.

Changelog:

 - fixed: HttpProxy mixes original site's content encoding with WebGUI's
 - fixed: Thingy i18n has an empty message
 - fixed: Thingy has no icon
 - fixed: Wiki page history shows username instead of alias
 - added: Uploads locations and files are set to the same uid/gid that owns the uploads root
 - fixed: SQL Form fields with a regex are required even if not set to required
 - fixed: Matrix caches pages, and may not update for new listings