Clarified AWS deployment procedure.
Clarified AWS deployment procedure.

See: https://www.pivotaltracker.com/story/show/112349613

Signed-off-by: Nagapramod Mandagere <459b9f2da98a4f81cc141b18707e9a2669e5cf9c@us.ibm.com>
Signed-off-by: Luke Woydziak <5ec47d3d6d41d8ebc18a534604a07e736a0a4783@emc.com>

concourse/concourse,concourse/concourse,cjcjameson/concourse,concourse/concourse,concourse/concourse,cjcjameson/concourse,concourse/concourse,cjcjameson/concourse