initialize sqitch configuration

* install sqitch with cpanm
* run `sqitch --engine pg init flipr --uri gitgit@github.com:eternal-turtles/flipr.git`
* add user info to sqitch.conf
* specify path to psql in case not set in PATH
add flipr schema
set default deployment target and always verify
add users table
Add `insert_user()` and `change_pass()`
tag the database with v1.0.0-dev1