* Introduce language choices for the recognition
(both on GUI and on CLI)
Bug Fixes
----------
* Fix saving and loading a project
* Fix saving a previously loaded and edited project
* Fix problem when adding new OCR engine from SettingsManager
* Fix error when deleting a page
Improvements
-------------
* Allow multiple images to be added at once
* Prevent errors when the OCR engine's
configuration has unknown settings
* Add OCR engine option to the CLI version
New and Updated Translations
-----------------------------
* Marek Černocký [cz]
* Daniel Mustieles [es]
* Gianvito Cavasoli [it]
* Fran Diéguez [gl]
* Piotr Drąg [pl]
* Matej Urbančič [sl]
* Yuri Myasoedov [ru]
* Мирослав Николић [sr]
