Merge pull request #49 from eile/master

Another libturbojpeg finder fix
Merge pull request #50 from eile/master

Add flags needed for gcov to gcc debug compilation
Merge pull request #51 from eile/master

Another Foo/FOO PackageConfig fix
Merge branch 'master' of https://github.com/Eyescale/CMake
Generalize test CMake magic and add coverage report generation to it