Fixes and updates

Added GetTorrent() x2 overloads to API class
Removed action=advanced from GetBrowse json query string
Updated types defined within ISearchTorrents
Created RangeSelector class in Test project
Added test GetTorrentTest_ById()
Added test GetBrowseTest()
Added test GetTorrentTest_ByHash()
Added test GetSimilarArtistsTest()
Added new property 'infoHash' to ActionTorrent.TorrentInfo
Added new property 'groupCategoryID' to ActionArtist.TorrentGroup
Added new property 'wikiImage' to ActionArtist.TorrentGroup
Added static 2 second timer on all whatcd calls - no more need for any
Thread.Sleep to avoid hammering the server