added config files for darwin, added swig and pce to build scipy, added ...

...packages.yml.darwin with patchelf removed

To build on darwin uncomment the darwin line on config.yml and copy packages.yml.darwin to packages.yml. 

To use installed profile for now you have to do

cd python-hpcmp2
export PATH=${PWD}/local/bin:${PATH}
export PYTHONPATH=${PWD}/local/lib/python2.7:${PWD}/local/lib/python2.7/site-packages:${PWD}/local/lib/python2.7/lib-dynload