fix issue #33
Merge branch 'develop' into fix/issues-33_opencv_gpulib_not_found
Merge branch 'develop' into fix/issues-33_opencv_gpulib_not_found

Conflicts:
	ext/opencv/extconf.rb
fix #33 and #49
bugfix
refactoring
Merge branch 'fix/issues-33_opencv_gpulib_not_found' into develop
update README.md