[Dev-luatex] Snapshot 20070619

[Taco Hoekwater]

Hi all,

After almost two months it was definately time for a new snapshot.

News compared to the 20070426 version:

* The lua node processing interface is completely reworked.
   It is now completely based on userdata, and uses a new lua table
   called 'node' to hold the methods. More detailed information
   is in the manual (of course).

* There is a fifth node processing callback:
      pre_output_filter
   this is executed just before the packaging of \box 255.

* The hpack_filter and pre_linebreak_filter callbacks now
   receive an extra argument indicating the number of top-level
   glyphs in the node list.

* Virtual fonts can now contain a 'node' key in the glyph
   commands: the value should be a hlist node (i.e.: a horizontal
   box), and that will then be output for each character access
   in that font.

* A new set of registers is added, called \attribute. These are
   values that will be automatically attached to nodes created in
   their scope. More information in the manual.

* Direct read/write access to TeX's box registers is addded to
   the lua 'tex' table.

* TeX's main memory now grows dynamically, and the (de)allocation
   routines have been rewritten completely.

* The 'kpse' table is extended with extra interface functions, to
   allow texlua to be used as a scripting engine.

* The \pdftexversion command now returns 200, not 140.

* The displayed banner and --version screens are cleaned up.

* The format file is now RLE compressed. Not as small as before,
   but unpacking is much faster.

Happy TeXing,

Taco