Allow an environment to be given to unicorn, based on rails' config
Rakefile: add task to write generated gemspec

The gemspec file has to be there in order to use this from Bundler with
a :path => "...".

--HG--
extra : rebase_source : c92cc45aa35e1c3d8f8b215b09a349f2ced895ba
ignore generated gemspec

--HG--
extra : rebase_source : 5d3b17d390e6261770de9bd9f4ec54731c7800c3
move wrapping of sudo command in "sh -c cmd" into one place

--HG--
extra : rebase_source : 1128620daf540e91ff74c889fda2088279adfc10
escape single quotes in shell-wrapped sudo commands

--HG--
extra : rebase_source : b2a9a686b372aeef4c8d7bb0b9abd36e6bad9175
prepare to release 2.2.1
tagging v2.2.1 for release
merge branch feature/allow-unicorn-to-be-given-an-environment