Update Postgres adapter to match Panoptes' tables

Add scripts to generate data update sql statements in adapter
mend
Merge pull request #17 from edpaget/update-database

Update Postgres adapter to match Panoptes' tables
Bump version
Update README.md
allow Cellect to skip zookeeper connection via cellect/testing.rb

For use in functional specs where zookeeper is not required.
fibonacci_heap requires v1.55
Formatting and default unmocked zk
Version bump
Undef mock_zookeeper default for preloading environments
Version bump