[connectionagent] Fix contention between manual connections and autoconnections.

When manually connecting to a service connection agent will respond to
the previously connected service going to the 'idle' state by
performing an autoconnect, which can trigger the connection to the
manually service to abort and the connection restored to the previous
service.
[connectionagent] Fix incorrect conversion of false to QString().

Quiet compile warnings.
Merge pull request #37 from amccarthy/master

Fix contention between manual connection and autoconnect
Bump version to 0.9.12.
Merge pull request #36 from lpotter/master

    [connectionagent] try harder to find a wlan. this adds a scan timer
bump version to 0.9.13
[connectionagent] fix bug where notification was sent at wrong time.

-
[connectionagent] hide the In-progress error.
and disconnect if connect failed.
[connectionagent] remove unused code