Experimenting with libreoffice tables.
Implement style and variable generation.

But still not working.  LibreOffice refuses to open the document.  Pretty
strange.
Added content helper.
Fixed bug which produces invalid document.

The error was that libxmljs rewrote some namespaces (mysterious).
Replaced libxmljs with xmldom.

This decision was taken because libxmljs got a segfault after the second parser
instantiation.
Added my hacking scripts to the gitignore.
0.2.0