Bug 1060250 - [Stingray][DLNA-player] Initial commit. This version implements:
              - Detecting dlna services around
              - ContentDirectory client
              - AVTransport client
              - ConnectionService client
              - Easy UI for local playing files
              - ssdp.js library
              - plug.play.js library
Merge pull request #26399 from rexboy7/1060250-DLNA-player

Bug 1060250 - [Stingray][DLNA-player] Initial commit. r=evelyn f=sc