Support font-lock on XEmacs-21, Emacs-20, Emacs-21. ...

Support Emacs-21.

Fix makefile for Windows ...

Brush up label completion
\cite completion
Support much more about LaTeX2e
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[yahtml]
English Info (By Jun Ohya)
Automatic pixel size detection for <img src="...">
Aware global-class of css definition
& for char-entity reference