GitLab

from Ross burton

add warning about no gpsd, simplify status handling code,
add status signal emissions to startup, make options handling more
robust

 * get rid of Shutdown method in D-Bus interface
 * add a pure virtual private method shutdown() to GcProvider.
   Providers should implement that.
 * connect to NameOwnerChanged signal in GcProvider,
   count owners in handler. If count drops to 0, run shutdown()

Client can now select the best provider based on
 * given requirements
 * provider status
 * provider theoretical accuracy
 * provider observed accuracy

Testing is _very_ difficult so bugs should still be expected. code is
still also a bit rough, especially in client.c.

So, Works For Me but needs refactoring and testing.

velocity still signals too often, see row 160 on geoclue.gpsd.c