Clean up CMake scripts
-rw-r--r-- 90 .gitignore
-rw-r--r-- 681 CMakeLists.txt
drwxr-xr-x - Example
-rw-r--r-- 640 FindGLPNG.cmake.in
-rw-r--r-- 978 Makefile
-rw-r--r-- 14641 glpng.htm
drwxr-xr-x - include
drwxr-xr-x - src