when on Mac - move chrome audio image to the right
Merge pull request #370 from SenecaCDOT-BigBlueButton/mac-chrome-allow-audio-window

when on Mac - move chrome audio image to the right
 - maintain backward compatibility with 0.8.1 where it converts meta params keys to lowercase
 - add comment on why we lowercase meta param
properly resized upload presentation window, removed unnecessary text
Merge pull request #371 from SenecaCDOT-BigBlueButton/upload-presentation-window-miscs

Properly resized upload presentation window, removed unnecessary text
added record icon to the recording notification
Added example of moderator-only welcome message
text changes to bbb-conf and index.html
Updated default PDF with text on each blank page
Minor updates to prompts
Merge pull request #372 from SenecaCDOT-BigBlueButton/record-reminder-icon

added record icon to the recording notification
Rewrite audio processing to use ffmpeg

There's some fairly major changes here, including:

* All audio is resampled to 48kHz stereo on input, allowing files with
  non-standard or varying rates to be mixed
* The audio processing is now done in a single pass; ffmpeg reads all
  inputs, concatenates them, and outputs one file.
Merge pull request #373 from kepstin/recording-updates

Rewrite audio processing to use ffmpeg
Use the correct timestamp for file start seek
Merge pull request #374 from kepstin/recording-updates

Use the correct timestamp for file start seek
 - prevent multiple start/stop audio recording events
Merge branch 'master' of github.com:bigbluebutton/bigbluebutton
Vorbis needs more bitrate for input with higher sample rate/stereo
Merge pull request #375 from kepstin/recording-updates

Vorbis needs more bitrate for input with higher sample rate/stereo