rails new rails-starter -d postgresql -T (4.0.0.rc1)
Update Gemfile for Rails 4.

This involves deleting the :assets group and bumping versions.
active_resource is no longer part of Rails
Simplify bundler require, since Rails 4 no longer has :assets group
Drop ie_conditional_tag, since it is not being maintained
bundle update
Remove whiny nils (deprecated in Rails 4)
eager_load needs to explicitly set in Rails 4
Remove config no longer supported in Rails 4
More development config best practices for Rails 4
Production config best practices for Rails 4
Test environment config best practices for Rails 4
Move config out of application.rb into initializers, per Rails 4
Clean up generator config
vendor/plugins no longer used
More minor tweaks for Rails 3.2 -> 4
Rename .gitkeep -> .keep and add for concerns
Rails 4 error page styles
Tweak to robots.txt
Rails 4 routes examples