Mnemosyne 2.5 released

[Peter Bienstman]

http://mnemosyne-proj.org/download-mnemosyne.php

(Mac version is coming shortly)

Mnemosyne 2.5 : 2017-06-26

-New feature: Study Modes, allowing you to e.g. only study unlearned

 cards. The Cramming scheduler is also migrated to this functionality.

-Added option to "Configure Mnemosyne" to affect how cards are displayed,

 in two boxes with fixed size, two boxes with adaptive size, or a single

 box top aligned.

-Tweaks to tag combobox (Emilian Mihalache).

-Updated to PyQt 5.8.2.

-Scaling for high-definition displays now enabled by default.

 (start with --disable-high-dpi-scaling if you prefer the previous behaviour).

-Fix crash when deleting unused media files (reported by gorgar).

-Small performance optimisations in the database.

-Fix crash in configuration widget under Linux with some fonts (e.g. Google

 Noto fonts) (fix by m4984).

-Fix crash when selecting negative tags (reported by 2a216566f1).

-Fix keyboard shortcuts not working sometimes (reported by Angelika Blaschka).

-Improved compatibility with different Qt versions under Linux

 (reported by Huang Shuhan).

-When setting the fonts for all the card types at once, the dialog will now

 correctly remember the setting (reported by 2a216566f1).

-Added warning if OpenGL libraries are missing under Linux

 (Andy Rayner).

-Try and work around cases where the progress bar after sync wouldn't

 close under Linux (reported by Kienan).

-Fix crash when running with the --debug option (reported by themusicgod1).