Make (empty) tagsdashed even if tags are empty
Downgrade code to fit Python 2.6
Add VCS feature back.
Logging/printing tweaks
Correct typo in file name
Should not set source_unpacked here, and certainly shouldn't set it to a wrong value.
Add step-specific cwd defaults
Add back prepare-like cmake feature.

Various logging and error cleanups.
Tweak where patch .applied file goes.
Get dot working again.
Start syncing the art configs with recent changes.

Currently broken
Fix regression.  The export_ variables should not be applied to the package in which they are defined.

Also remove the obsolete, parallel implementation of env munging that is applied immediately.
Fix typo in new code that adds teh build environment to the log file.
Clean up configuration formatting.

Catch up art config.

Grouping is not working.
Fix grouping.

There is still something wrong with resolving format strings properly.
Fully build up each package's configuration including contributions from feature requirements before talking to waf.

Now builds art stuff up through ROOT.
Add in a 'bits' and a 'libbits' config items for 32 vs 64 labels.
Small fixes.
More packages.
Initial draft of presentation to LBNE.