bug with outputHelp

I was a bit too quick with pull request #8, and introduced a bug there.

process.argv needs to be parsed here:
https://github.com/Unitech/pm2/blob/master/bin/pm2#L201

but NOT here:
https://github.com/Unitech/pm2/blob/master/bin/pm2#L195

So now `pm2 blablabla` goes to infinite recursion. I hope this time I get this right. :)