Added option to remove procs with 0 elements from solve for CISM-Albany runs.
    This is done by creating a reducedComm object and makes use of some of Mauro's code
    from MPAS-Albany (thanks for sharing it, Mauro!).  Right now the removal
    of procs with 0 elements is off by default, as I would like to test it further on
    bigger problems.  To turn it on, please uncomment

    in felix_driver.cpp .