Install rails_upgrade plugin.
Remove deprecated ActiveRecord calls.
Update routes to Rails 3 syntax.
Fix require in test_helper.
Add an application.rb.
Add basic Rails 3.0.20 Gemfile.
Run Rails 3.0.20 app generator and fix up results.
Use mysql2 version that is compatible with Rails 3.0.
Move parameter filter setting to new place for Rails 3.
Fix syntax error in Bunny.
Update custom date/time formats for Rails 3.
Remove initializer used to prepare Rails 2 apps for Rails 3 defaults.
Tighter HTTP verb matching in routes.
Fix some deprecated method calls in exception_notification plugin.
Fix use of deprecated constant RAILS_ROOT.
Use new exception notification gem.
Update ERb concat helpers to Rails3 style.
Include exception notifier correctly.
Add gem to retain legacy Prototype functionality.
Fix use of deprecated #write_attribute.