Some minor mistakes have been fixed in the Users' Guide.

Copyright dates have been fixed. A couple of minor errors in
docstrings of the setupdocs.py module have been fixed too.
Issue #22 has been fixed.
Thanks To section has been updated.
Fixed a bug in the cut node operation.

After cutting a node neither one of its siblings (if any) nor its
parent became the current (and selected) node.
The example scripts have been migrated to PyTables3 syntax with pt2to3.
Data presentation of EArray has been debugged and simplified.
The package vtWidgets has been renamed accordingly to PEP 8.
The package vtTables has been renamed accordingly to PEP 8.
The package nodeProperties has been renamed accordingly to PEP 8.
The package docBrowser has been renamed accordingly to PEP 8.
The module zoomCell has been renamed accordingly to PEP 8.
The module inputNodeName has been renamed accordingly to PEP 8.
The module dataSheet has been renamed accordingly to PEP 8.
The module scrollBar has been renamed accordingly to PEP 8.
The module leafView has been renamed accordingly to PEP 8.
The module leafModel has been renamed accordingly to PEP 8.
The module leafDelegate has been renamed accordingly to PEP 8.
The modules aboutPage has been renamed accordingly to PEP 8.
The module configIOException has been renamed accordingly to PEP 8.
Some minor changes done.