lowercase issue for LIBCLANGMM_BUILD_TESTS

[dfleury2]

Hi,
in the CmakeLists.txt file, LIBCLANGMM_BUILD_TESTS is incorrectly spelled in lowercase (line 14)

[eidheim]

Thank you, I also updated the README.md. We should really move away from the boost test framework and create simpler tests instead, as done in juCi++. The tests should also utilise boost::filesystem so that make test would work.