Prefer the MIT Licence in README and LICENSE and .gemspec
Fix licensing
Merge pull request #703 from capistrano/fix/cc-license

Change the LICENSE.txt to CC by nc sa.
Don't do :cleanup twice

As it's already beeing called from https://github.com/capistrano/capistrano/blob/master/lib/capistrano/tasks/deploy.rake#L22
Update README.md

add missing "bring" to example sentance
Set stage at the beginning to be able to use it from config/deploy.rb
Warn developers that :all is a meta role
Fix for #705
Default stage template cleanup

Since `stage` is already set (https://github.com/capistrano/capistrano/pull/712), we don't need to declare it twice here.