Link to helpful article on Capistrano deployment

@SamSaffron mentioned in #809 he wouldn't mind me linking to a helpful
article on Capistrano deployment in those sample files. My totally
unbiased opinion is that the one I've committed here is the best one.
:wink:

Signed-off-by: David Celis <me@davidcel.is>
Merge pull request #812 from goodbrews/capistrano-samples

Link to helpful article on Capistrano deployment