Add missing ft2build.h to linux64 freetype package.
Do not erase cache every login forever, when NewCacheLocation is set a non-existing directory!

I can't believe that I have not have gotten a cache for two years
because of this... I knew I didn't, but didn't really want to fix
it while I working on the network code (AICurl) ;). It kinda made
for a good testing. Bet my ISP is glad I fixed it though.
Italics hotfix

Restores use of the old slant_amt offset for italicizing fonts by slanting quads.
Note that this is the wrong way to fix the issue and should eventually be removed.
Merge branch 'master' of git://github.com/Lirusaito/SingularityViewer
Merge branch 'master' of git://github.com/AlericInglewood/SingularityViewer