* Add ability to specify images as bootstrapped to change default bundles
* Order of bundles and scripts in bundles now preserved in script run order
* Add maverick and natty to image names
* Add bootstrap-python bundle
* Eliminate stack trace on normal exit
* Improve documentation on shell commands
* Give more detailed error information with exit codes
* Fix bug in processing -c flags on command line
* Support loading default provision_secrets in virtualenv directory