updated for new fs_homepath value
global linux installer update

* installer now expects a tar.gz archive
* omnibot archive is now installed separately
* can download with axel, curl or wget
* added some colors
removed obsolete mp_bin.pk3 requirement
updated logo bitmap
Update etlegacy.nsi

installer: omnibot shortcut fixed
added the vcredist installation if needed
fixed the redist install to match 2013 version
removed obsolete downlaod server