Fixes listen call in run

Closes #6
Merge pull request #7 from loladiro/master

Don't execute parser again on upgraded connections
uv_error no longer exported
Add docs/HttpServer.md
When a handler returns a non-Response, merge data into previous Response
Adds tests and travis integration
adds package for travis
Revert "When a handler returns a non-Response, merge data into previous Response"

This reverts commit f06e80f529985bad4854d8464303ad3aa4a4ad8c.
Remove unnecessary tests
Update notification info to email Zach and Daniel
Client Certificates