unnecessary commands removed which oprated a directory level.
like include_directories() link_directories()
Now operating on the target directory using target_include_directories()
target_link_libraries() commands.
generating library target using generate_cbm_library() macro provided by us.

This version is an exact copy of the last revision of the trunk branch
of the old SVN repository of CbmRoor at
https://subversion.gsi.de/cbmsoft/cbmroot/trunk
The old SVN repository will still be available for read access.