Sprockets recipe raises errors

[joallard]

Just want to pitch in that the Sprockets recipe seems to raise errors and need some adjustments. Namely, the environment setting defaults to the symbol :development rather than the Sprockets environment.

Here's my snippet:

sprockets = Sprockets::Environment.new
set :sprockets, sprockets
sprockets.append_path "assets/stylesheets"
sprockets.append_path "assets/javascripts"

I'm in the middle of a project right now and don't have the time for a PR, but I thought I'd at least leave some notes here.