Update dependencies

[EvanK]

Dependencies to update:

• Yeoman generator
• node
  • at minimum, should require 0.12...possibly 3.0 4.0? (enforceable from package.json)
  • may be a good foundation for replacing bower entirely with npm
• npm installed deps
• ansible
  • minimum 2.0, with updated nested_dict lookup (enforced from checkDeps in generator)