Update dependency and extra packages
Add additional commands to SQL schema for the purpose of purging information from the database correctly
Update version matrices
Update osc-info.sh to generate per-product version, per-target platform version matrices
Clean it up just a little bit
Further cleanup
Remove roundcubemail-skin package
Enhance osc-info.sh just a tiny little bit more, and run it again
adapt Android client instructions to latest davdroid version