The patch also fixes:

* Fixes the chicken/egg problem present in the current gem system when
  gems are defined in the config that are not yet installed.

* Remove the need to have hoe as a dependency of your production app.

* Makes the gem 'unpacking' system a lot less fragile.

Signed-off-by: Matt Jones <al2o3cr@gmail.com>
Signed-off-by: Pratik Naik <pratiknaik@gmail.com>