reorganizing folders for pandora install
scons calling cassandra
installation of cassandra
fixes #19, closes #85, closes #86, closes #87
closes #20
fixes #91
updating code
getting rid of several compilation flags
unified scons file
pkg-config changed for python-config (osx compatible)
updated to osx
closes #89
unit tests
functional tests updated (except parallel)
updated mpi code
updated examples
removed duplicated example
fixes #93
closes #90 with a shared_ptr approach to python objects sent to c++
closes #84