Merge pull request #3 from paulca/master

add a :unicorn_roles attribute
version bump for PR#3
add unicorn_options
Merge pull request #6 from tablexi/unicorn-options

add unicorn_options
-E is for RACK_ENV not RAILS_ENV
Merge pull request #7 from tablexi/unicorn_rack_env

-E is for RACK_ENV not RAILS_ENV
updated for 3.1
updated for issue #2
typo