This commit adds support for full names for day-of-week, as it appears that some exported documents contain the full day names instead of their three-letter abbreviations.
In case of errors, the error message now also includes the value that was found.
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