Split CampingServer into classes

[mfredrickson]

The attached patch splits the logic that was in the bin/camping into a Camping::Server::Base class with several child classes (Console, Webrick, Mongrel, and Lighttpd). This is mostly a cut and paste job. My fingers are sore from hitting CMD-C, CMD-V so many times.

There are probably a bunch of ways to implement this. I chose to go the parent class - child class route. Perhaps my Java is showing. At the same time, if an object responds to start it can work with the system.

I've been testing this patch with a series of RSpec tests (to be submitted later - they need some clean up themselves). So far, all good, but I'm sure there are bugs.

[mfredrickson]

A patch to break down the bin/camping monolith into several little 'liths

[why]

Yay. Thankyou thankyou forevermoor.