anvill packaging scripts

How to generate packages

1. Configure and build anvill
2. Set the DESTDIR variable to a new folder
3. Run the packaging script, passing the DESTDIR folder

Example:

anvill_version=$(git describe --always)

cpack -D ANVILL_DATA_PATH="/path/to/install/directory" \
      -R ${anvill_version} \
      --config "packaging/main.cmake"