Merge pull request #14 from poeks/master

Add id pk to stats table, migration to swap group_id and client_id in db
only log SQL in development
begin adding support for "hourly" precision
Merge branch 'master' of github.com:esripdx/rainman
switch to Sequel migrations
Store with precision "hour" if specified.
fix sql
Merge pull request #15 from aaronpk/master

Adds support for storing with hourly precision