Windows installer for LyX 2.0.4

[Uwe Stöhr]

I now finished the new Windows installer. It is the merge of my old one and Joost's. I already have 
released a test version some weeks ago to be able to iron out some remaining issues. The last step 
was to enable the support for installing LyX without admin privileges. This is now also possible 
thanks to the new ImageMagick versions.

You find it here:
https://sourceforge.net/projects/lyxwininstaller/files/LyXWinInstaller/2.0.4/
We could also put it on our FTP server.

I'll announce it this time also on the users list to get some feedback.

regards Uwe