Mnemosyne 2.10 ready for testing

[Peter Bienstman]

Mnemosyne 2.10:

- Update to all the latest libraries, most importantly from Python 2.8

  to Python 2.11, and from PyQt5 to PyQt6. You might see better

  performance.

- Tweaked appearance of application.  

- Optimised startup time.

- Switched audio and video support from mplayer to Qt.

- Fix Google text-to-speech for Spanish (reported by Language Lover).

- Google translator should work again.

- Support for multiple audiofiles in the webserver (patch by jooseef).

- Scale images and add support for Map card type in web client (patch by

  gbear605).

- Fix TypeError when activating cards (patch by Adam Smalhofer).

- Make sure the review server also works for non-latin audio files

  (reported by jooseef).

- Fix corner case when previewing cards after changing their card type

  (reported by Gnome).

- Removed option to insert Flash in cards.  

https://www.dropbox.com/s/vrbdtyifcde290x/mnemosyne-2.10-setup.exe?dl=0

Bug reports welcome!

Peter