Fixes and bug fixed from v. 2.1
Comple/Build issues fixed
- MinGW/GCC compiler issue when compiled w/o -DVGM_USES_TEMPLATE: #2
- CMake issue with CMAKE_FIND_LIBRARY_PREFIXES, when compiles example
- CMake issue when build with GLFW in windows, when compiles example
Example fixes/improvement
- CMake improvement: use of built-in macro_lib