BRL-CAD Fixes (previous pull request should be closed as obsolete)

[tbrowder]

Fixes are included to (1) enable shared AND static libraries for all (users can choose to turn off either at ../configure time, (2) add missing compile switch -fPIC for all libraries (thanks due to Cristina Precup, BRL-CAD contributor), and (3) mention BRL-CAD as a user.

[mjwybrow]

Thanks Tom, these changes looks fine.

Would you be happy to assign the copyright on these changes to Monash University? This is important to us if we want to put your changes in the standard version of the library since (in addition to the open source licence) we currently commercially licence the library to a few people and this requires Monash to hold the copyright for the whole codebase. A simple statement as a comment would suffice, saying "I hereby assign copyright in this code to Monash University, to be licensed under the same terms as the rest of the code."

[tbrowder]

Happy to do so, Michael:

I hereby assign copyright in this code to Monash University, to be licensed under the same terms as the rest of the code.

-Tom