Code documentation

Dan Mills has created a doxygen template for the Rivendell project. While many functions are not yet documented, it is a start in the right direction.

Try:
./autogen.sh
./configure
make doxygen

In a fresh source tree, the output is placed in
docs/programming/<application>

I run the library first then all the rest in parallel which may need
amending if you are short on ram.

Regards, Dan.