Corrects Trac ticket #70.  Insures that NRTHSRT based systems are treated the same as NERTH systems.  Previously, an attempt to create a new NRTHSRT system without an ellipsoid specification failed.
Corrects Trac ticket #70.  Insures that NRTHSRT based systems are treated the same as NERTH systems.  Previously, an attempt to create a new NRTHSRT system without an ellipsoid specification failed.

git-svn-id: a2bff39a7848988ed2ca894f77eecdfa44a5cc3b@1932 4e78687f-474d-0410-85f9-8d5e500ac6b2

normanb/CS-Map,normanb/CS-Map