Fixed served unable to start on mac os

Changed http_endpoint to be an inner class of webserver.

This avoids the class being publicly accessible in a cleaner way because it avoids using friends as a mechanism to allow instantiation within stl structures

Upgraded version

Update travis configuration file to match code requirements

version 0.11.1

version 0.11.0

Updated copyrights

Version 0.7.1

Version 0.7.0

version 0.6.3