[comedycentralshows] Transform the rtmp urls so that rtmpdump can download them (fixes #3010)

From 'rtmpe://viacomccstrmfs.fplive.net/viacomccstrm/gsp.comedystor/*' to 'rtmpe://viacommtvstrmfs.fplive.net:1935/viacommtvstrm/gsp.comedystor/*'
[theplatform] Use unicode_literals and _download_json
[nrktv] Recognize tv.nrksuper.no URL
[fc2] Encode the string used for the md5 checksum

In python 3 it must be a bytes object.
[fc2] Recognize urls without language part (reported in #1154)
[vevo] The title in the url is optional (fixes #3020)
release 2014.05.31
release 2014.05.31.1
release 2014.05.31.2