Merge pull request #22 from towerhe/master

Fixed tests
Merge pull request #24 from towerhe/import-without-a-key

An import step is not need a key to be defined.
get rid of this ridiculous warning
fix #26 and #27 - modern way of passing arguments to psql
import to tables without primary keys - this failed on postgres
bump minor
relax dep on roo because i think they fixed the problem in 1.10.2
Merge branch 'master' of https://github.com/seamusabshere/data_miner into patch

Conflicts:
	lib/data_miner/step/sql.rb