clearing the lru_cache close to the beginning of a request to limit impact of caching errors in multi process/threaded web serving - towards #613

git-svn-id: https://svn.apache.org/repos/asf/bloodhound/trunk@1611921 13f79535-47bb-0310-9956-ffa450edef68
add vagrant provisioning using puppet
add proper public source box, small fixes
Add (vagrant related) documentation
add PostgreSQL support to puppet deployment script
fix virtualenv owner