Fixes #227. Launched machines should announce their state as "started"
Cleaning up omnibus usage to link embedded bin, ruby into default $PATHs, rather than use /etc/environment to try tweaking (doesn't hit a large number of programs)
Merge pull request #228 from infochimps-labs/launched_nodes_are_started

Fixes #227. Launched machines should announce their state as "started"
Version bump to 4.7.1
Regenerate gemspec for version 4.7.1
changes necessary to support private IPs in a VPC on EC2
add configuration for us-west-2 ubuntu precise AMIs