Lazyfoo lesson 19
Merge branch 'new-api' of https://www.github.com/haskell-game/sdl2 into Lesson19

Conflicts:
	sdl2.cabal
Merge pull request #27 from Mokosha/Lesson19

Lesson19
Correct cabal entry for lazyfoo lesson 19
A few more changes to get in line with other examples
Merge pull request #28 from Mokosha/Lesson19Fix

A few more changes to get in line with other examples