Create mock generator

[mazerte]

Create a CoffeeScript parse for generate automatic class mock for unit-test.

• remove all unused import
• create fake method (same name but return a static value)
• rename the class (ex: AppView -> AppViewMock)

Usage:

• yo footguard:mock class_path
• yo footguard:mock all
• yo footguard:mock update
• yo footguard:mock update class_path