makeinc2cmakeconf.py - generate a OMNeT++Config.cmake from OMNeT++'s Makefile.inc
  WIP: still needs to parse library-flags, deal with variable-references and maybe some testing
makeinc2cmakeconfig.py:
  more rebust empty-line handling
  note about variable references in Makefile (unsupported)
  be aware of CPPFLAGS
makeinc2cmakeconf.py:
  add printing usage with -h
  ask before overwriting config-file
  avoid cmake_set and _add switcheroo ("cmake_op") by always using add and empty initialization
  refactored (c)flags-parsing
  added LDFLAGS and *_LIBS parsing
makeinc2cmakeconf.py:
  add some command-line options
  use list(APPEND A *) instead of set(A $A *) in CMake
  properly set multiple values to CMake variables
  generate a CMake Version file
  fix case for build-configuration (first letter capital)
add geninetconf.sh for generating an OMNeT++INETConfig.cmake
add CMakeLists.txt
add README.cmake
note: build with CMake is now functional
silence three annoying, mostly useless warnings
move built binary to top-level build directory
setup environment for in-place run
fix up includes
more constness, more references (in place of pointers)
other minor changes