depend on levels
replace Config::Configuration with Levels
reimplement configuration logging with Levels
require open3
finish configuration logging
specify the levels branch so we can use local bundler
Merge branch 'master' into rc-levels

Conflicts:
	lib/config.rb
update Levels::Merged to Levels::Configuration
rewrite the configuration spy to use Levels
Merge branch 'master' into rc-levels
use released levels
Merge pull request #52 from rcarver/rc-levels

Levels