Create a branch for documentation work.


[SVN r44584]
Merge with trunk.

[SVN r44810]
Use root links in quickbook.


[SVN r45364]
Merge latest changes from unordered.

[SVN r45892]
Use both PNG and SVG versions of the buckets diagram.


[SVN r46017]
Improved function summary tables in unordered documenations.


[SVN r46018]
I'd hacked the bibliography to avoid showing the title twice, but this was
causing problems when generating PDFs, so show the title twice.


[SVN r46019]
Don't use the compact boostbook refernce style in the standalone documentation
as it is too wide for printing out.


[SVN r46020]