changes:
-Improvements in the double-buffering system
-Implementation of a triple-buffering system for the graphical object
-Improvements in the partial redraw system
-Start the implementation of document parts and preambles
-Simplifications in configure.in and the main makefile
-Global folding and unfolding according to type of contents
- Tree call-backs at modifications in documents
- Path-aware trees
- Bug fixes w.r.t. previous version
- Better handling of parameters for page size and margins
- Implementation of ``mutators'', tags which may modify themselves
- Let computer algebra sessions make use of mutators
- All TeXmacs documents become part of one global super-document
to bomb out. Secondly it made assumptions about the processor being a 32
bitter wich gave rise to various warnings about pointer to integer
conversion. These were not that serious for they were mainly used for
calculating hash values but i decided to fix those too if only to get
better hash values.