If a 'zip-excludes.lst' file is found in the craft's base directory, that will
overwrite the global catalog exclusion list.
Three new unit tests have been created to test the functionality.
This will enable richer author meta-data in aircraft, and hence
nicer GUI presentation of author information. Client-side support
still to be added before this can be used
Support multiple primary aircraft in a package, which has several
aircraft developers have requested. This adjusts the handling of
the variant-of and primary-set tags.
Additionally, this adds partial unit-test coverage for -set.xml
scanning and catalog XML generation.
Run ./test_catalog to run unit-tests of the catalog generation.
