Refactoring Zzz for better Object encapsulation and test

- Instead of using http.Server.prototype to provide Zzz functionality, Zzz creates a modified http.Server
- Switch test framework from vows to mocha: 100% code coverage
- Add makefile for easy testing
Update Zzz module interface to be more similar to http.Server interface
Ignore code coverage output
Updating version
Merge pull request #1 from avayanis/0.2.x

0.2.0