remove 2 second delay that was causing instance networking to fail
specify path to ec2-ami-tools in bundle commands
default to us-east-1 region

also make additional target regions into a user variable, defaulting
to [ "us-west-2" ]
rearrange ami naming for sort aesthetics
add spec for ohai ec2 hint
remove readme text wrt required aws variables, as they all have reasonable defaults
Revert "default to us-east-1 region"

This reverts commit 1406700cef87d135ad11889b71d53392753c548c.
default to us-east-1 region
use chef 11.6.0 as that is our current standard
install some harmless packages that are commonly used by django apps
support installing ruby from system packages, default to packages
add gems script to install some heavyweight gems in both chef and system rubies
run specs under sudo
fix ups for ruby/gem scripts
updating aws builders in vagrant template