Lot's of these will end up coalesced I think. Additionally, lots of data
to fill into them. But this at least let's us know where we stand.

Fixed a small issue that disallowed include the headers in C++

Signed-off-by: Toon Schoenmakers <nighteyes1993@gmail.com>

We might actually want to do a per-architecture version of this so that
we can do a full fence. But this should work for now.

explicitly pass in the manpage name.  Otherwise the man page name
selection is hard to control and the docbook xml we're generating
doesn't quite line up with what xmlto wants

Adding in configuration files and build system stuff to build html docs
and man pages from asciidoc source.

Created/migrated a couple of pages by way of example:
o bson.7
o bson_new.3

Also increase the number of passes.

This enforces UTF-8 valid keys before calling visitors.

Fixing some errors in sub-document example