Due to package upgrades (docbook, passivetex), removed some

Due to package upgrades (docbook, passivetex), removed some
bug-patches and created some new ones in the stylesheets.
Also tweaked some files to structure the xml properly.
The FAQ and the Quick-Start are now 'articles' inside a book-wrapper,
which is as it should be.

FAQ.xml
- due to various passivetex bug fixes, the faq is now a properly
  structured xml qandaset document

quick-start-guide.xml:
manual.xml
- Fixed some passivetex-workaround kludges:
  legalnotice -> author

manual-core.xml:
For readability, added '<command>' to varlistentry items
since passivetex (sigh) will no longer indent the para text.

index.xml:
- loads of white-space readability tweaks here and there.

tech-docs.xml
dist-docs.xml
manual.xml
- additional entries to <bookinfo> for compatability with
  the rest of the docs.

/docs/Makefile.am
- added stuff to use the new vg-faq2txt.xsl stylesheet

/docs/lib/Makefile.am
- updated to reflect current contents of /docs/lib/
- removed refs to vg-html-single as is never ever used

/docs/lib/vg-fo.xsl
- massively updated to reflect losing old bugs and gaining new ones

/docs/lib/vg-common.xsl
- deleted as only contained two lines common to html and fo,
  so not worth the bother of hauling around

/docs/lib/vg-html-chunk.xsl
- added what was in vg-common.xsl

/docs/lib/line-wrap.xsl
/docs/lib/faq2text.xsl
- two new stylesheet files for transforming FAQ.xml to FAQ.txt

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@5234