Update Specs to Include fakeweb Web Mock

Update the specs and gem specifications to include the fakeweb web mock
gem in order to test web interaction.
Change spec_helper for require_relative

Update the spec_helper to utilize the require_relative statement in
order to provide a more readable requires section.
Add Spec for Unknown API Version

Update the API spec to include testing for an unknown version.
Fix Spec Syntax for AppManager

Update the AppManager spec to ensure that it reads well.
Add can_connect? Spec for Server and Fixtures

Update the Server spec to include a can_connect? test to check whether a
Server can reach its associated AppManager instance. Also add fixtures
for tests that simulate sample XML responses.
Add can_connect? Method to Server

Update the Server class to include a can_connect? method.
Add API FactoryGirl Factory

Add an API Factory for testing.
Add Nokogiri as Gem Dependency and Add to Lib

Update the gemspec and include Nokogiri in the AppManager class.
Add a Version 11 API

Add a Version 11 API for the AppManager API module.