Merge pull request #32 from rburchell/master

[voicecall] Remove Qt 4 support.
Merge pull request #41 from rburchell/master

Sync fixes from Telepathy handler to Ofono.
[voicecall] Use correct return type in reply handler.

Also fix memory leak.
Merge pull request #42 from martinjones/jb11912

[voicecall] Use correct return type in reply handler.
[voicecall-manager] Use systemd Wants instead of Requires for ngf and tonegen

Requires is a hard dependency that considers the unit failed if the
dependencies fail. Voicecall should still run if either of these is not
available.
Merge pull request #43 from special/master

[voicecall-manager] Use systemd Wants instead of Requires for ngf and tonegen
[voicecall] Store the incoming/outgoing state when the call begins.

Otherwise the state is lost when the call is ended and we need it
when saving call counters.
Merge pull request #45 from martinjones/jb14481

[voicecall] Store the incoming/outgoing state when the call begins.
[ngf] Use play.mode=short for subsequent incoming calls.

When one (or more) call is active, new incoming calls shouldn't play the
full ringtone but less intrusive one instead.
Merge pull request #46 from jusa/second-ringtone

[ngf] Use play.mode=short for subsequent incoming calls.
[voicecall] Don't set disconnected status prematurely.

Wait for telepathy to tell us that the call has been disconnected
before changing the status.

Don't remove the handler until telepathy invalidates the connection.
Merge pull request #47 from martinjones/hangup

[voicecall] Don't set disconnected status prematurely.
[voicecall] Fix call duration stalling during device suspends
Merge pull request #48 from jpetrell/master

[voicecall] Fix call duration stalling during device suspends
[voicecall] Revert "Don't set disconnected status prematurely."

This reverts commit ce6f3a386f916ed6860d5f945a094052b4d3df51.
Merge pull request #49 from martinjones/hangup

[voicecall] Revert "Don't set disconnected status prematurely."
Add some actual data to README.