Added a file: ruby_binding/test_camping.rb

Added a file: ruby_binding/test_camping.rb
When you run this program with the command line argument "ebb" it will start
a Camping server on port 4001 hosted by Ebb. When you run the script with a
"mongrel" argument it will start a server on 4002 hosted by Evented Mongrel.

My initial tests show that Ebb is faster than Evented Mongrel. For example
here are the number of requests per second that I clocked (averaged over 5
trials with ab -n 1000)

        Ebb  Evented Mongrel
-c 100  306  248
-c 50   363  266
-c 10   416  295
-c 1    428  270

I hope that optimizations will be able to increase those numbers. Also, the
evented mongrel crashes several times during these trials. The very buggy Ebb
server didn't at all.