[GRASS5] Proj library update

[Glynn Clements]

Roger Miller wrote:

> > The new "projects.h" file includes "proj_api.h", which doesn't exist.
> 
> I added and committed proj_api.h.  I don't think the library or the GRASS 
> additions use the api at all.  It is a relatively recent addition to the lib. 
>  Perhaps it's good to include it for future use.
> 
> Anything else?

It's probably worth updating the version information in
src/libes/proj/README.

The datum tables (and their compiler) also need to be added at some
point.

-- 
Glynn Clements <glynn.clements at virgin.net>