`rake squash:notify` broken on Capistrano deploy

[cbeer]

In faefca8, the capistrano squash:notify step was changed to call rake squash:notify, however it looks like there are two different squash:notify rake tasks:

• https://github.com/SquareSquash/rails/blob/master/lib/tasks/squash.rake
• https://github.com/SquareSquash/rails/blob/master/lib/squash/rails/tasks.rake

Should the old one be removed? Should the new one be renamed?