Merge pull request #54 from eile/master

Generalize test CMake magic and add coverage report generation to it
Merge pull request #55 from eile/master

Check for incompatible lcov/gcc combinations
Merge pull request #56 from eile/master

Pass ARGS to ctest for tests target
Merge pull request #57 from eile/master

lcov/travis fix
Merge branch 'master' of https://github.com/Eyescale/CMake
Update README