- use ® instead of ® in html templates - seems to work better with
  doxygen at the moment

- drop old table-based formatting in favour of div.
- use single css with @import to minimize the impact of style changes
  on the html documents themselves.
- separate css/ directory
- locate css graphic elements inside the css/ directory for easier
  relative addressing.

- seems to work more reliably than the previous indented colons

- also update links from opencfd.co.uk -> openfoam.com

- space between keyword and bracket in 'for(..)', 'if(..)', 'while(..)'

- makes it easier to copy Doxyfile for local Doxygen generation
  ie, for debugging and writing without processing everything

- use ':' to prefix verbatim code instead of #+BEGIN_EXAMPLE / #+END_EXAMPLE
  for a somewhat better feeling for the indentation.

- markup codingStyleGuide.org examples so they actually indent correctly

- use 'Info<<' as per codingStyleGuide instead of 'Info <<'

- doc/THIRD_PARTY lists where various third party sources can be found

XiModel.H
SCOPELaminarFlameSpeed.H
basicXiSubXiEq.H
basicXiSubG.H
Doxyfile (include PATH to OpenCFD Macros)
doxyFilt (include class documentation in /src)

This reverts commit 7446cee7.

 Added doc/Doxygen/tools/find-debugNames to help but the problem requires
 more attention (Henry/Andy/Mattijs?)
 Caveat:
   - names defined with nested defines will be missed.
   - names defined via typename will be missed.

Cleanup example:

#!/bin/sh
(
cd $WM_PROJECT_DIR
doc/Doxygen/tools/find-debugNames|tee debugs.orig|sed -e 's@ *//.*$@@'>debugs
diff -uw etc/controlDict debugs > debugs.diff
echo "hand-resolve the conflicts - see debugs.diff"
)