[Milestone] v1

[jcbhmr]

• Create npm package
• Add interface() decorator #6
• Add some way to coerce arguments
• Add some way to coerce return types
• Add attribute() decorator
• Add readonly() decorator
• Add examples of vanilla JS usage
• Add examples of TS ES-decorators usage
• Add test Dog (interface) + Pet (mixin) + ServiceDog (extends) + Dog (partial)
• Add ES decorators for these things!
• Add automation #5