[Developers] Documentation of output from tpl2cpp and tpl2rem

[Hans J. Skaug]

Developers,

The way I see it the classes and functions generated
by tpl2cpp and tpl2rem is not covered by Doxygen because
these resides in files that are project specific. 
Nevertheless these classes are key to understanding
how ADMB works. What about the following idea:

We include files generated by tpl2cpp:
example.cpp
example.htp 
in the code base and document these such that they get 
picked up by Doxygen.

This could be a joint effort with many people contributing,
increasing our collective understanding of how things work.

Hans