Delete IPs that are in policies

Otherwise we spin finding the same ip over and over. This is a
**HOTFIX** long term solution is to push the policy enforcement into the
db query for addresses **OR** keep track of policy excluded ips, and
filter them out in the next query.
Merge pull request #114 from rackerlabs/policy_fix

Delete IPs that are in policies
Merge branch 'master' of github.com:rackerlabs/quark