[MERGE] Add missing entries to doc/developers/index.html

[Ian Clatworthy]

Eric Siegerman wrote:
> On Sun, 2009-03-15 at 08:49 +1000, Ian Clatworthy wrote:
>> My concern was more about links that ought to be added to index.txt,
>> i.e. *.html files that get generated in that directory but aren't
>> visible in index.html.
> 
> OK.  This change makes all content in doc/developers reachable
> (perhaps indirectly) from that directory's index.html.  It also
> fixes the remaining broken links within doc/developers/*.txt.

Thank-you!!

bb:approve

Ian C.