I'll keep the code here for my reference, but I advise against using or building on it.
Your use of this engine in a project involves at least:
Specifying “gem 'scrypto', :git => 'email@example.com:justindthomas/scypto'” in your Gemfile.
Mounting the engine as “mount Scrypto::Engine, :at => '/scrypto'” in your routes.rb.
Creating “scrypto-config.js” in an appropriate location following the expected syntax (currently evolving, to be formally documented in the future).
Adding “//= require scrypto/scrypto” and “//= require scrypto-config.js” to your application.js.
See the changes associated with the 'integrate-scrypto' branch of my Diaspora* branch for a current example of how to properly configure your application.