more extensive checks

Will check for the existnace of mediainfo and ffmpeg
Get imdb type
Clean up echos'
Merge branch 'dev' of https://github.com/ugokanain/nZEDb into ugokanain-dev

Conflicts:
	www/lib/postprocess.php
Perms
Syntax.
Merge branch 'dev' of https://github.com/nZEDb/nZEDb into dev
I'm not sure if this should be the guid, but there's no releaseID so Im setting it to guid until you check.
Merge pull request #339 from nZEDb/dev

Changes to post proc, movies and syntax error in update_releases.