Don't build the examples when -fNoExamples is set.
Correct signature of getRenderDrawBlendMode

CC @Polarina
Merge branch 'master' into new-api
Add script find_missing_symbols.sh
Add getRenderDriverInfo
Add SDL.Input.Mouse with relative mouse setting
Merge ssh://github.com/haskell-game/sdl2 into new-api

Conflicts:
	src/SDL/Input.hs
	src/SDL/Input/Mouse.hs