[O] Patches for org-generic-export

[Robert P. Goldman]

Attached is a set of patches to the org-generic-exporter.  They fix a
change in the org-preprocess process that means that all uses of the
org-generic export facility will crash.  They also add rudimentary
support for trac wiki and tikiwiki export.  Finally, I have removed
the HTML exporter from the org-generic export.  I don't see any reason
to struggle to support this, since it is done better by the core parts
of org-mode.

Cheers,
r


Table of contents:

[PATCH 1/5] bind org-export-current-backend in generic exporter.
[PATCH 2/5] Added trac-wiki and tikiwiki export settings.
[PATCH 3/5] Kill the HTML exporter.
[PATCH 4/5] Fixed section-header-prefix for trac wiki.
[PATCH 5/5] Fix header prefixes for trac wiki.