cleaning up
refining sdp modification
renaming findCodecPayloadType to getCodecPayloadType
Merge remote-tracking branch 'upstream/master'

Conflicts:
	samples/web/content/apprtc/apprtc.py
	samples/web/content/apprtc/index.html
	samples/web/content/apprtc/js/main.js
merging changes into sdputils.js signaling.js
style reformat
found a bug
adding removeCodecParam to global
defaulting opusfec to undefined
separating param from its value
separating param from value in add/removeCodecParam
using addCodecParam() in maybeSetVideoSendInitialBitRate()
Merge remote-tracking branch 'upstream/master'
modifying codec parameters by parsing them into key:value pairs
improving code style
put 'header' and 'params' as separate fields
to pass style checker
some renaming per Justin's comments
extracting payload type in fmtp line
removing an unused variable