Add module.utils.which
YoutubeCom: Add support for time specification, if ffmpeg is installed and in PATH
Move which function to YoutubeCom plugin
YoutubeCom: Show start time in package name
YoutubeCom: fix program flow quirks
YoutubeCom: Fix file naming quirks
Merge pull request #53 from enkore/stable

Implement »YoutubeCom: Accept a start time parameter«