Issue #14 Cache Initial OS X install so subsequent builds are faster.
Merge branch 'master' into shadowimage

Conflicts:
	AutoDMG/IEDSourceSelector.py
Restrict dmg mounts to Apple_HFS partitions.
Only keep the last adtmpl in the image.
Bring back verbose stack traces for uncaught exceptions.
Use adtmpl in image to determine if updates should be applied.
Added adtmpl document type and icon.
Added loading and saving of templates from GUI.
Load image representation immediately to avoid generic source icon.
Debug to stdout in GUI.
Remember template filename for saving.
Disable GUI while loading source from template.
Enable open recent menu.
Also add saved documents to recent list.
Issue #51 download updates during CLI run.

Added -U/--download-updates option.
Shorter naps when doing a dummy install .
Syntax changes.
Merge branch 'shadowimage'