Add cache busting logic

Clear cache when the repositories are updated (metadata update).
Also clear when any client sends new package data.
Clear cache on any repo CRUD operation as well

The cache needs to be invalidated whenever a repository is changed
in the frontend.
Bump version number again

Push out hot fix release for caching issue. This improves the
rollout readyness :)
Merge pull request #46 from ckassen/featur/cache_buster

Clear cache on any repository update