sdxo#4151: Fixing an absolutely well-caught corner-case :)

Signed-off-by: Ajay Garg <ajay@activitycentral.com>
Disabling the UI, while operations are going in the background. Not doing this, and if an action-button is clicked in the interim, the UI hangs.

Signed-off-by: Ajay Garg <ajay@activitycentral.com>
sdxo#4242: Changed the date-format

Signed-off-by: Ajay Garg <ajay@activitycentral.com>
sdxo#4201: Changing to 2 decimal places.

Signed-off-by: Ajay Garg <ajay@activitycentral.com>
sdxo#4152: Using the "title" and "language" fields also from the server.

Signed-off-by: Ajay Garg <ajay@activitycentral.com>
Fixed combo boxes height

Conflicts:

	GetBooksActivity/getiabooksactivity.py
	MyLibrary/mylibrarytab.py
Updated translation generator
Updated translations
Don't put pyc files in the installers
Fixed labels in getbook's book info
Fixed book labels in Mylibrary
Run xargs with -r in generate_installer.sh
Showing a line with the commit and version number after generating the installer
Signed-off-by: David Rodríguez <daroal@activitycentral.com>
Updated gitignore
Updated translations
Updated placeholder icon
Merge branch 'master' of sugardextrose.org:ebookreader
#4153 Add version on Guia Lector Ceibal.html
Updated placeholder icon proportions
Merge branch 'master' of sugardextrose.org:ebookreader