Version 2.2.0
Version 2.2.0

This release includes two significant user-visible changes, and one for
devs:

* #129 - fetch login or password from env
* #136 - only start previously-running services on restart
* #130 - remove .ruby-version

Thanks for @grosser for all three of these patches!

wolfd/boxen,dieterdemeyer/boxen,boxen/boxen,boxen/boxen,n0ts/boxen,1gitGrey/boxen-1,pattichan/boxen,n0ts/boxen,pattichan/boxen,n0ts/boxen,halyard/boxen,wolfd/boxen,halyard/boxen,wolfd/boxen,boxen/boxen,dieterdemeyer/boxen,halyard/boxen,pattichan/boxen,1gitGrey/boxen-1,1gitGrey/boxen-1,dieterdemeyer/boxen