change footer to include version
change 'download' btn to 'Open PDF Reader'
fixed audio player play and pause button issue on Android tablet
fixed the video points jump to 750 issue
prettify PDF container and related content container
makeing sidebar title vertically aligned
Merge branch 'develop' of https://github.com/learningequality/ka-lite into develop-beta-language
Beta language packs checking
Merge pull request #2721 from 66eli77/develop-beta-language

Develop beta language