add CMake to openEMS
Merge branch 'openEMS-cmake' of git://github.com/guitorri/openEMS
fix cmake and update gitignore

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
cmake: more options & update gitignore

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>