Improving performances by removing Spacer component when possible, replacing them by style values and replacing boxes containers by canvases.
User settings menu placed at the same vertical level settingsBtn and horizontally at it right.
 - use default resolution from config.xml when skipping webcam settings check
Merge branch 'master' of github.com:bigbluebutton/bigbluebutton
Configuration updates for moving to 0.81-RC2
fixed small bug in bbb-conf --setip for LTI
Updated wording of welcomeMessageFooter
set video quality
don't  pass the file extension
set sample rate
separate scaling and padding commands for deskshare
Merge pull request #266 from gugat/matterhorn_081

matterhorn scripts work with new version of ffmpeg
update locales
Merge pull request #267 from gugat/locales

update locales
remove audio extension in webcam processing for matterhorn
Merge pull request #268 from gugat/matterhorn_081

fixes audio  extension problem in matterhorn
Make generation of png images for pdf pages more resiliant.

We now use ghostscript to output pngs directly from the original pdf,
rather than using convert on the split pages. This should make corrupt
or strange pdfs less likely to cause issues.

As well, if a pdf page conversion fails (for any reason, including that
the original pdf is missing...) it will be logged, and a blank page
generated, and processing will continue.
Merge pull request #270 from kepstin/presentation-resiliance

Make generation of png images for pdf pages more resiliant.
Fixed broadcast module not showing for clients, multiple windows opening for presenter and stream not playing if joining once the stream was started
 - fix issue where viewer stop sharing webcam when switching presenter
   https://code.google.com/p/bigbluebutton/issues/detail?id=1641