[Merge] lp:~jonas-drange/ubuntu-settings-components/asyncness into lp:~phablet-team/ubuntu-settings-components/printer-components

[Jonas G. Drange]

The proposal to merge lp:~jonas-drange/ubuntu-settings-components/asyncness into lp:~phablet-team/ubuntu-settings-components/printer-components has been updated.

Commit Message changed to:

* rename CupsPkHelper to IppClient
* drop CupsFacade and move everything to PrinterCupsBackend
* add delete functionality
* move PrinterDriverLoader into it's own file
* add PrintersLoader
* break PrintJob API (force clients to use Printers.createJob(printerName)
* fix some read/write bugs that caused unnecessary cups communication
* Add JobFilter
* Moves JobModel to Printers so there is only one.
* Printer::jobs() is now a proxy (filter), lazily coupled with a source model.

For more details, see:
https://code.launchpad.net/~jonas-drange/ubuntu-settings-components/asyncness/+merge/316786
-- 
Your team Ubuntu Phablet Team is requested to review the proposed merge of lp:~jonas-drange/ubuntu-settings-components/asyncness into lp:~phablet-team/ubuntu-settings-components/printer-components.