video: make video support optional
windows: define UNICODE
windows: fix OS version reporting
osx: fix sg_clock_getdate
sdl: make command line parsing lenient
osx: fix NPOT texture loading
build: ignore generated files
analysis: fix integer narrowing
analysis: fix integer narrowing
analysis: fix integer narrowing
analysis: fix integer narrowing
analysis: suppress warning
cleanup: remove unused source files
analysis: fix integer narrowing