Give C-based TreeIterator a normal __module__.
Expose the XXTreeIterator.

Note that the Python version exists only for BBB:  no application code
should instantiate one directly.
Include 'docs' in manifest.

Drop no-longer-used 'include'.
Nest into Github.

- Denominate files to indicate ReST.

- Drop .bzrignore.
Merge branch 'expose_tree_iterator'
Explain emulation of private iterators.
Prep 4.0.4 release.
svb
Fit the 'repr' of bucket objects.

Broeken version could contain garbage characters.
Prep 4.0.5 release.
svb
'Updated Travis YAML.'
Update to latest v1 bootstrap
Make sure MANIFEST.in is complete
Fix version check in setup.py

I don't think we intentionally checked for Python 4.
Typo
Changed the 'ZODB' extra to require only the real 'ZODB' package.

Previously, the extra required the 'ZODB3' metapackage:  depending on the
version used, the metapackage could pull in stale versions of **this**
package and 'persistent'.
Prep 4.0.6 release.
Merge branch 'master' of github.com:zopefoundation/BTrees
Changelog for setup.py version fix.