New staging area design

Remove areas and DirectoryContainer.  Pack containers during archiver
time rather than put.
Merge remote-tracking branch 'origin/master' into new-staging
archiver: implement container verification
Fix buggy unit test
Cleanup empty dirs in staging during archiving
Primitive staging upgrade tool
Minor name changes
Give tar entries more human-friendly names
Nicer version command
Nicer version command
Add a basic fsck tool
fsck: verbose should default to false
Trying out coveralls with jacoco
Drop tx_blobs, record tx times, check container state
Release 0.26.5
Merge remote-tracking branch 'origin/new-staging'

Conflicts:
	src/doss/local/DirectoryContainer.java