Fixed missing generic parameter

There was a missing generic parameter in InserBefore of list.monkey
Improved compatibility with WebKit and the CEF

This commit adds content-type header to http requests so it can be
loaded nicer on WebKit or Chrominium based browsing engines.
Removed a comment

Just removed a comment that should not be there
Removed small debug print from source
Added version info on the MServer GUI

Added version info on the MServer GUI as there was no version numbering
of any kind.
Update mserver.bmx