Missing gems on plugin Gemfile template

Hi folks,

When I tried run `rails server` on dummy app from my engine, I received the message *couldn't find file 'jquery'*, and after I added *jquery-rails* to Gemfile, I received *couldn't find file 'turbolinks'*, then I added *turbolinks* too.

Now it's OK.

This should be default, doesn't it?

Sorry for my bad writing.