Revert "Merge pull request #46 from nctiggy/master"

This reverts commit 5e8545985938b9604cb6c3a1d7576f5118e4ced7, reversing
changes made to de9cadb0b212a111c41e6f9641365fb793954ab5.
fixed audio codec settings being ignored

Only when using nzbToCouchPotatoMP4.py
max bitrate cap

Capped max audio bitrate to 1536 to avoid ffmpeg errors.
Merge branch 'master' into dev

Conflicts:
	manual.py
	mkvtomp4.py