move FemLib/* to OGS since they are OGS specific classes
delete FemLib from CMake directories, include directories and dependent libraries
Merge branch 'move-FemLib-to-OGS' of https://github.com/norihiro-w/ogs into norihiro-w-move-FemLib-to-OGS
Merge branch 'norihiro-w-move-FemLib-to-OGS'