[mw44118/pitz] 26a173: Reverted Gael's patch on Bag.values.

[nor...@github.com]

Branch: refs/heads/master
Home: http://github.com/mw44118/pitz

Commit: 26a1739723319e1bcbd656aa42c47605ebefbc04
http://github.com/mw44118/pitz/commit/26a1739723319e1bcbd656aa42c47605ebefbc04
Author: W. Matthew Wilson <ma...@tplus1.com>
Date: 2009-08-28 (Fri, 28 Aug 2009)

Changed paths:
M docs/data-model.rst
M pitz/bag.py
M tests/test_bag.py

Log Message:
-----------
Reverted Gael's patch on Bag.values.

That patch broke Bag.contents.

Also, now Bag.append returns a reference to the original bag.