Switch over to use the net-http-persistent gem for keep-alives with the WebDriver

Fixes #36

Gemfile

@@ -1,4 +1,4 @@
-source "http://rubygems.org"
+source :gemcutter
 
 gemspec
 

lib/sauce/selenium.rb

@@ -1,6 +1,8 @@
 require "selenium/client"
 require "selenium/webdriver"
 
+require 'selenium/webdriver/remote/http/persistent'
+
 module Sauce
   class Selenium < ::Selenium::Client::Driver
     def initialize(opts={})
@@ -21,7 +23,7 @@ module Sauce
   class Selenium2
     def initialize(opts={})
       @config = Sauce::Config.new(opts)
-      http_client = ::Selenium::WebDriver::Remote::Http::Default.new
+      http_client = ::Selenium::WebDriver::Remote::Http::Persistent.new
       http_client.timeout = 300 # Browser launch can take a while
       @driver = ::Selenium::WebDriver.for(:remote, :url => "http://#{@config.username}:#{@config.access_key}@#{@config.host}:#{@config.port}/wd/hub", :desired_capabilities => @config.to_desired_capabilities, :http_client => http_client)
       http_client.timeout = 90 # Once the browser is up, commands should time out reasonably

sauce.gemspec

@@ -34,6 +34,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency('rake')
   s.add_development_dependency('bundler')
   s.add_development_dependency('rspec')
+  s.add_dependency('net-http-persistent')
 
   if s.respond_to? :specification_version then
     s.specification_version = 3