* master: (53 commits)
fix issue with listenOnly not hanging up
- spell the word correctly
- minimize logging
Add catch all exception to bbb-web redis subscriber
Update styles.scss
HotfixChat, HTML5 issues #3829
fix undefined voiceBridge
moved componentWillMount to component..
Faster PDF pages counting by replacing "pdf2swf" command with "pdfinfo".
add aria-label to chat log
Fallback again to 72 DPI PNG for complex PDF pages.
Changed screenshare's publish and view windows to use CustomMdiWindow
resolve lint warnings on modified files
Fixing bug that was causing a stack overflow when checking permissions of ignored windows
move audio tag to component
Rename GhostscriptPageExtractor to PageExtractorImp.
change aria-labelledby to aria-describedby
Fix avatar issue in chat, HTML5 #3830
add suggested changes
Remove usage of GhostScript and replace it by pdftocairo and pdfseparate.
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