branch boyceg: fix to INSHierarchyIntegrator to use F_fcn and Q_fcn to determine whether to use forcing or source/sink terms; had previously been using null/non-null checks with F_var and Q_var, which is not reliable
branch boyceg: fix to INSHierarchyIntegrator to use F_fcn and Q_fcn to determine whether to use forcing or source/sink terms; had previously been using null/non-null checks with F_var and Q_var, which is not reliable

git-svn-id: 668c94791126b0c8906896ca082e88e0811ecee5@2457 d09065f7-430b-272c-15e1-d58225cc4d83

MSV-Project/IBAMR,MSV-Project/IBAMR,MSV-Project/IBAMR,MSV-Project/IBAMR,MSV-Project/IBAMR,MSV-Project/IBAMR,MSV-Project/IBAMR