Slight alteration on the wording

Hi

Slight alteration on the wording to make flow better.

One other things you may want to change is /root/ to ~/

ie 

sudo mkdir ~/sabnzbd-config
sudo mkdir ~/sabnzbd-data

Generally people should not be working as root. 

Not that important though :)
Merge pull request #1 from timhaak/patch-1

Slight alteration on the wording