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
  - Delete the RCP feature/plugins before we do the umbrella feature build (to avoid compiling things we don't need)
TISTUD-4200 Clean up non-Ruby/PHP related rubles for Titanium Studio
  - Add a new com.aptana.studio.rubles plugin to hold rubles/bundles
  - Hook up to shove YAML ruble into the new plugin
TISTUD-4200 Clean up non-Ruby/PHP related rubles for Titanium Studio
  - Add property for ruby.executable to try and fix build