Added a few known AMI's

Added logic to force ephemeral disks (for other testing).
Merge branch 'master' of https://github.com/mapr/private-mapr-deployments
Fixed problem with CentOS version checking when installing EPEL.
Sample of our 1-master config
Added "obsolete" message"
Updated with check of ssh key before launch (in an attempt
to be more stable for new users).
progress on multinode install, added cluster.json => node manifests converter
update to chef recipes for configure & disksetup
phase 3 (configure.sh and disksetup) initial work
expose hosts and ips in manifests script
add install and package scripts, still work in progress
cleanup some files and then ignore in future
version bump for mapr
move java config into cluster manifest file, and generated node manifest files
add DEV file as test for doing berks install on dev box, other dev code removal
make better paths in tarball during packaging
TODOs
relocate TODO
hostname fix, now works on EC2
package gets example cluster.json file