Merge pull request #35 from Summeli/master

byteswap functions added for Symbian & Blackberry
Fix cityhash for non-glibc systems where byteswap isn't defined. Define it manually instead. Also, fix harmattan building of Qt frontend.
Merge pull request #36 from xsacha/master

Build fix for Symbian, Blackberry10, Harmattan, Pandora
Add dither to state. Allow choosing FBO color depth. Disable VBO for draw_buffer but keep code.
Routing loggings in Symbian though qDebug to the console