Correct to channel5 and debian control.

Channel5 don't check for Birghtcove just use website name. Include plugin version. This doesn't fix Channel5 encryption issue.
Debian control, typo in package name, use blowfish_pp as all perl so can also be used for windows combine-get_flash_videos. Move rtmpdump into recommended, it is in fact required however if using a rtmpdump built from git then don't want to have the debian version installed.