libtorc-core: Standardise use of platform name for TorcHTTPServer
Don't translate application names
libtorc-media: Rename GetVersion to GetMediaVersion

- as GetVersion is an 'inbuilt' service method
libtorc-core: Add a start time and priority property to TorcLocalContext

- start time is the time at which the application was start, represented
as the number of milliseconds since epoch.
- priority is currently zero in all case.

Both will be used to by Torc peers to decide which will act as server
and which as client. Higher priority will dictate the server and in the
event of a tie, 'older' applications win.
libtorc-core: Add GetStartTime, GetUuid and GetPriority to root service
libtorc-core: Add uuid, start time and API version to Bonjour txt
records
libtorc-core: Start connecting to discovered peers