Otherwise people using this might be confused that their server starts
and does nothing

  - lower case commands
  - place test executables in top-level build directory

  - Doocs .conf and variable mapping templates
  - Implemented ApplicationInstance.cc
  - Fixed working directory in CMakeLists.txt

  - Added (d)map files
  - Adapted CMakeLists.txt
  - Separate src file for application instance

  - Added ApplicationModule, test and config
  - Extended CMakeLists.txt accordingly
  - TODO: .dmap-, .map-files