Add a AsAppParseFlags flag to be able to append non-duplicate data
trivial: Fix 'make distcheck' after the bash completion file was added
Add libappstream-builder from the createrepo_as project
Add AppStream builder plugins from the createrepo_as project
Add appstream-build from the createrepo_as project
trivial: Fix up the example spec file to reflect reality
trivial: Add example scripts for Fedora and Ubuntu