Improve instructions

After walking through our blogging setup process with Stewart, I was
able to identify a few things that could be improved with this document.
This commit hopes to make getting started with our blog a little easier.

Change-Id: I58e94d61e7ce7f4e7b794831edecc6294e50c4f5
Reviewed-on: https://gerrit.causes.com/29431
Tested-by: jenkins <jenkins@causes.com>
Reviewed-by: Nebojsa Petrovic <nebs@causes.com>