refactored steam adapter to class, rewrote tests. All green
added a null case handler in the steam adapter
added inlude game_name to get game method in steam adapter
null object pattern api tested
added get friend list api tests
tested api null object pattern for get friend list
finished steam api get games tests
Merge pull request #19 from fence-lizards-2014/steam_api_class

Steam api class with tests done - reviewed by Jake, 7/5 3:51pm