extendible
Extend constructors using backbone's .extend signature
csextends
Use the Coffee-Script extends keyword outside of Coffee-Script. Useful for easily extending existing existing classes, e.g. `require('csextends')(klass, extensions)`, and for providing your module consumers with an easy way to extend your classes, i.e. `B
extendonclass
Add a backbone-like extend method onto your CoffeeScript classes, making it easy for JavaScript users to extend your CoffeeScript classes
