[MP] Style: spelling mistakes
[MP] Style: remove vec_t, add matrix3_t
[MP] Optimisation: missed some prefix increment on iterators
[MP] Re-enable the somehow disabled icons on the server browser.
[MP] Merged fix from ioq3 that was reported by me: ioquake/ioq3@983ebbb
Ignore -psn* arguments on Mac OS X
Mac OS X adds an argument starting with "-psn" when launched using Finder, Dock,
or a terminal using open command and not specifying arguments.

It caused the opening videos to be skipped.

This change mimics SDL 1.2.
[SP] Merged fix from ioq3 that was reported by me: ioquake/ioq3@983ebbb
Ignore -psn* arguments on Mac OS X
Mac OS X adds an argument starting with "-psn" when launched using Finder, Dock,
or a terminal using open command and not specifying arguments.

It caused the opening videos to be skipped.

This change mimics SDL 1.2.
Build codeJK2/game with mingw32
Merge branch 'master' of https://github.com/JACoders/OpenJK
Update readme