Tabnetviz

Fixed: program reported the previous version number.

* yamlloader loads dict instead of ordereddict for Python 3.7+, leading to errors. This has now been fixed.
* Documentation improvements.

Improvements:

* catch invalid or misspelled keywords, quantity names, attribute names, provide suggestions
* clusters can be specified as dictionary as well as list
* improved user guide (TOC, figure, etc.)
* show version number with -h option

Bug fixes:

* fixed handling of parallel edges in multigraphs
* fixed error when edgestyles are defined but nodestyles are not

Version number had to be changed to match PyPI version.

Initial stable release.