Log Message:
- update to TeXmacs 1.0.6
- reindent a bit
- take maintainership (ok with recht@)

Changes in TeXmacs 1.0.6:
* Improved LaTeX and html converters and support for MathML.
* An alpha-version of a graphical mode for drawing technical pictures.
* Default use of Type 1 fonts.
* New plug-ins for Maple and Mathematica.
* Simple animations.
* Faster booting.
* Started documentation of the Scheme API.