updated params for audio/video bitrates
added onStart method that sends ffmpeg command
version update
version update
removed npm log
remove npm
Merge pull request #166 from btmdave/master

Created onStart() method to provide access for the actual ffmpeg command and fixed legacy bitrate params
Thumbnails: pass additional options to ffmpeg invocation

.addOption and .addOptions had no effect on thumbnail generation. Example use
case is adding vfilters to the output with addOption("-vf", "hflip").
Merge pull request #172 from lookback/master

Thumbnails: pass additional options to ffmpeg invocation