TISTUD-4183 Simplify the File > New From Template menu
  - Remove the editors we don't want in core and bump them up to umbrella feature
  - Move YAML, IDL, and Markdown test plugins out to umbrella feature
  - Move deploy.capistrano, deploy.engineyard and deploy.heroku plugins to Ruby feature
TISTUD-4183 Simplify the File > New From Template menu
  - Remove references to test fragments for editors moved out of studio3