fix - youtube-dl incorrect download

it looks like `bin/version` is included in the published `npm package.tgz`. This is reporting incorrect `Already up to date xxxx.xx.xx` during `npm install youtube-dl` while `bin\youtube-dl` still contains old version `2012.02.27`
Merge pull request #20 from przemyslawpluta/master

fix - youtube-dl incorrect !download