Modified to implement postgres adapter and...

...postgres sql changes

567 examples, 0 failures
Coverage report generated for RSpec to /Users/yzhang/the_policy_machine/coverage. 624 / 702 LOC (88.89%) covered.
Passes specs in dalton postgres branch with this commit on postgres, mysql and memory backends
Actually, wait, we're already doing that. `https://github.com/mdsol/the_policy_machine/commit/c02bb208b1625e5d3aa9c825dfb579c60a00fa59`

So you can probably just remove this line.