Merge pull request #30 from martinjones/master

[libqofono] Expose CLIR, CLIP, etc. as properties.
update version to 0.48
Fixed apparent typo
Merge pull request #31 from monich/minus_zero

Fixed apparent typo
[libqofono] Added QOfonoConnectionManager::filter property

Allows showing only particular type(s) of oFono contexts in the UI view.
Merge pull request #32 from monich/filter

[libqofono] Added QOfonoConnectionManager::filter property
bump version to 0.49
[libqofono] Keep the list of contexts in order.