Moved CMake detection of SDL, X11 works in cygwin via cmake, VS Release mode works. (UNIX status unknown)
Merge pull request #15 from shadowpho/ecs2

Added a very dirty caching algorithm. Speeds up my program byabout 70%.
Fixed uninitialized memory bug
Fixed cmake for SDL on linux
Improved SDL build on linux, breaking all others
Fixed include for memset
Disabled X11 for windows and SDL for cygwin by default