This PR deprecates the `mssp` and `od4b` backends as they stopped working when the APIs were turned off.
The upgrade path is to use `sharepoint` instead (which used to be named "SharePoint v2").
This PR also adds a small amount of metadata to modules so they can be marked as "untested" or "deprecated", and the configuration for marking modules has been set up in `BackendModules.cs`.
The backends that we currently cannot test (usualy due to not having public signups) are now marked as untested.
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.
Kenneth Skovhede