[WIP] Add unverified Fortran Star+ from elemen...

Add unverified Fortran Star+ calculation from elements.
[WIP] Add unverified Cython and Cilk Plus Star+...

Add unverified Cython and Cilk Plus Star+ calculation from elements for
a single cardinality.
Add Cilk Plus functions for computing Star+ for...

Add Cilk Plus functions for computing Star+ for nets of the same
cardinality.
Update README to compile non-shared Fortran obj...

Update README to compile non-shared Fortran object.

Configure dynamically Cython extension to dynamically link to
`libcilkrts` to provide support for Cilk Plus reduction sum.  Note that
this requires `libcilkrts.so` to be available on the library path.  This
library is included in both the Intel compiler suite or the Cilk branch
of gcc.