[SVN] r5380 (Rails)

[Duane Johnson]

Added optional parameters to rake_helper. Added a 'Migrate to Previous Version' command. Organized migrate tasks in to hierarchical menu.

Changed:
A   trunk/Bundles/Rails.tmbundle/Commands/Migrate to Previous Version.tmCommand
U   trunk/Bundles/Rails.tmbundle/Commands/Rake Migrate to Version.tmCommand
U   trunk/Bundles/Rails.tmbundle/Commands/Rake Migrate.plist
U   trunk/Bundles/Rails.tmbundle/Support/bin/rake_helper.rb
U   trunk/Bundles/Rails.tmbundle/info.plist