Rocco Rutte:

- manual update: rework the key definition zoo to prefixes C- and -E (for LaTeX) (via <muttng-doc:key/>)
- manual update: add example layouts to convention section in intro chapter
- manual update: remove 'unbound' or 'not bound' as key definitions
- manual update: update Hacking Documentation
- manual update: add <muttng-doc:special/>
- manual update: don't use any XML code within verbatim environments
- manual update: add manual-tex.xsl to transform XML into LaTeX that actually runs through without error ('make manual-ng.(pdf|ps)') (most of the logic is done much shorter in muttng.sty) (pdflatex runs just fine, latex required breakurl.sty, tex4ht should work)

git-svn-id: svn://svn.berlios.de/mutt-ng/trunk@526 e385b8ad-14ed-0310-8656-cc95a2468c6d