(tex-dvi-view-command): Use `yap' on w32.

(tex-dvi-view-command): Use `yap' on w32.
(tex-font-lock-keywords-1): Add url and nolinkurl for args with `_'.
(latex-block-args-alist): Add minipage and picture.
(latex-block-body-alist): Use reftex-label if enabled.
(latex-insert-block): Don't insert a \n if not necessary.
(tex-compile-commands): Make sure dvips doesn't send to printer.
(tex-compile-default): Handle the case where no executable is found.
(latex-noindent-environments): New var.
(latex-find-indent): Use it.  Take an empty line as an arg-breaker.
If tex-indent-allhanging is non-nil, make sure we only align for macros
at beginning of line.