[ZODB-Dev] Problem with documentation and distribution files.

[Estaban]

Hey, 

Can you help me?

The Zope standalone system seems to be working on my system now,
but the only example file clearly uses BTree which is NOT part of the 
standard python distribution OR the standalone ZODB distribution:

# Ensure that a 'userdb' key is present
if not dbroot.has_key('userdb'):
    import BTree
    dbroot['userdb'] = BTree.BTree()

userdb = dbroot['userdb']

Can you help me out here? There are other BTREES in the standard python 
distribution, but no BTree. with a BTree() thats for sure.

If you can help me, this would be a good thing to update in the docs.

Thanks!
Estaban