This release includes a significant change to the way chroots are built.
Rather than building individual chroots for each bundle, a single full
chroot is generated, and JSON metadata files are created for each bundle.
This allows us to scale much more easily on machines with limited disk
space. Because chroots are now decoupled from manifest creation, this
also makes it possible in the future to move to bundle builds on
distributed machines.
Additionally, a change was made to allow developers to add extra files
to a bundle in addition to those included by the bundle packages.
A change was included that fails when the manifest cannot be parsed.
Minor bug fixes are also included.
