Update setup.py
Update setup.py

I added two modification to setup.py which allowed me to build carma_pack: 
"include" in the include_dirs - missing the one in src directory 
and modification to Armadillo lib pointer. 
I can build it on Linux CentOS6 now (with the system installed BOOST and Armadillo)
farr/carma_pack,brandonckelly/carma_pack,farr/carma_pack,brandonckelly/carma_pack