[libqofono] Emit property change notifications signals when setting modemPath.

Setting the modemPath causes the local object to connect to a different
remote object. The local cached value of the remote object's properties
were being updated correctly, however, the property change notification
signals were not being emitted preventing QML bindings using those
properties from being reevaluated.

Removed redundant conditional tests either because they were unneeded
or because they had only one possible outcome.
Merge pull request #14 from amccarthy/set-modem-path

[libqofono] Emit property change notifications signals when setting modemPath
[libqofono] bump version to 0.31
[libqofono] make sure when phonesim is detected as hardware, that real
hardware is listed first.
[libqofono] bump version to 0.32
[libqofono] Call barring fixes.
Merge pull request #15 from martinjones/master

[libqofono] Call barring fixes.
[libqofono] Fix message manager API.
Merge pull request #16 from martinjones/master

[libqofono] Fix message manager API.
[libqofono] bump version to 0.33
[libqofono] bump version to 0.34
initial provisioning
[libqofono] fixes from review
[libqofono] fix crash when there is no valid contextpath
Merge pull request #17 from lpotter/master

initial provisioning
Match property declaration type with the type of the getter function and notify signal
Expose remoteHeld property in QOfonoVoiceCall
Merge pull request #18 from jpetrell/master

Small fixes to QOfono API
[libqofono] Fixes for message waiting API.
Merge pull request #19 from martinjones/master

[libqofono] Fixes for message waiting API.