Provide starter templates for each language

[alec-ng]

Looking at this functionality - http://ideone.com/

It would be helper when a user creates a new tab or switches languages, a starter piece of code is provided.

Populate code editor with language specific starter code when...

• new tab is created
• user switches language on an existing tab that meets one of these conditions:
  • the contents of the editor was the starter code for any language
  • the editor is