Migrate to the new configuration interface, use the legacy way as fall back.
Merge branch 'master' of github.com:liske/apt-dater
Update clients submodule to most recent version.
Add negative lookbehind to error detection. This stops matching lines like "No error reported.". Closes github issue #25 by Stefan Eriksson.
Merge pull request #26 from liske/master

Merge recent commits (fixing missing lookbehind in ErrPattern's default value & ongoing development).