Even before bundler came with cap tasks built In I anticipated this problem. I
use my own bundler recipes
https://github.com/donnoman/cap-recipes/blob/master/lib/cap_recipes/tasks/bundler/install.rb
It creates a bundled directory in shared but it's not symlinked. Instead it's
used like a cache
We recently came across a situation where we couldn't rollback a deployment
because the new deployment borked the gems in the bundler gem cache.
Capistrano does a great job of versioning the code, but it seems to me that
the bundle of gems should be versioned as well to ensure the rollback will
