Wrong install statement in CmakeLists.txt

In _https://github.com/Snaipe/fmem/blob/master/CMakeLists.txt_

Shall be 
_install(FILES
  ${PROJECT_BINARY_DIR}/gen/fmem.h
  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})_

and not 

_install(FILES
  fmem.h
  ${PROJECT_BINARY_DIR}/gen/fmem-export.h
  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})_

This issue is generalization of #3 