switched the word close in the audio and video popups with cancel
when options is clicked focus the user list
added pre and post text to the slide in the Flash client
removed the deskshare region button from the tab order
changed the url in the footer to be an actual link
added content headers to playback.html
added checkbox to conditionally expose chat messages to a screen reader
RaP: Remove the ffmpeg version check, hardcode arguments for 0.11+

For BigBlueButton 0.81, we just require that you install ffmpeg 0.11.x
for recordings to function correctly. I'll also add a check to bbb-conf
to verify that the correct ffmpeg is available.
Add an ffmpeg version check to bbb-conf --check
Merge pull request #217 from kepstin/ffmpeg-version-check

FFmpeg version check changes
Merge pull request #216 from SenecaCDOT-BigBlueButton/second-round-accessibility-fixes

Second round accessibility fixes
updated label to 0.81-beta-2
minor updates in copyright line
Another tweak of copyright line
Reverted back change ... not getting the formatting right on copyright line
Fixed two spelling mistakes in US english file
Merge branch 'master-bigbluebutton'