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

[Jonas G. Drange]

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

Commit Message changed to:

* Rewrites Printer, PrinterJob, PrinterModel to all use a new backend.
* Adds new backend that bridges PDF and Cups implementations.
* Drops PIMPL idiom since we're not going to export C++ headers anyway.
* Tries to deal with some RAII issues.

For more details, see:
https://code.launchpad.net/~jonas-drange/ubuntu-settings-components/printerbackend/+merge/315317
-- 
Your team Ubuntu Phablet Team is requested to review the proposed merge of lp:~jonas-drange/ubuntu-settings-components/printerbackend into lp:~phablet-team/ubuntu-settings-components/printer-components.