[libupnp] Sync Policy data structure
[libUPnP] SyncStatus Data structure
[libUPnP] 'SyncData' data structures
[libUPnP] add Changelog data structures
[libUPnP] add sync pair data structure
[libUPnP] helper that deal with sync status variables
[libUPnP] Add xml content sync service description
[libUPnP] add sync service specific didl extensions
[libUPnP] Content Sync skeleton
[libupnp] Ctrl point helper to invoke sync actions
[libUPnP] Implement SyncData mangement actions
[libUPnP] Implement syncpair handling functions
[libUPnP] implement actual sync specific actions
[UPnP] Add DB that keeps track of our sync relationships
[UPnP/DB] Add SyncPair tables and management
[UPnP] hookup content sync stuff to gui (TODO: remove, and unify with montellesses workgit add -p)
[UPnP] add setting for enabling/disabling content sync... has some issue
[UPnP] move starting/stopping of ctrl point in own functions
[UPnP] give the upnp server access to a ctrl point
[UPnP] Content Sync Skeleton