Adds rake tasks for running test files and the webserver.

$ rake
rspec ruby/spec/maidenhead_spec.rb
.

Finished in 0.00076 seconds
1 example, 0 failures
RSpec tests have been run.
Tests have been run.
Starting web server now. Exit with Ctrl + C.
ruby ruby/webserver.rb
== Sinatra/1.4.5 has taken the stage on 4567 for development with backup from Thin
Thin web server (v1.6.2 codename Doc Brown)
Maximum connections set to 1024
Listening on localhost:4567, CTRL+C to stop