Re-implemented everything using ASP.NET.
Changed some requests to use JSON instead of FORM data.
Some work towards deleting the FIXMEGlobal instance.
Auth is missing, XSRF does not work correctly.
Added a delete page with options to delete the local database, as well as the remote files.
Added a captcha to protect against automated attacks that would attempt to delete the remote files.
This fixes#1201