A simple service to maintain the top scores for a given category (i.e. game), using XML files to store the data.

The following operations are supported. For a formal definition, please review the Service Description.

• registerForScores
  Register for score submission, using combination of GUID and encryption key to authenticate
• showSupported
  Show all of the supported games
• getScoreXML
  Get the high scores as an XML document for a given game category
• isSupported
  Check whether a game category is supported
• submitScore
  Submit a score using GUID and response crypt key from registerForScores method