fix MVdiv and MVeq to prefer doubles. get MVmod working as per PICKOS. add test_math
fix MVdiv and MVeq to prefer doubles. get MVmod working as per PICKOS. add test_math

exodusdb/exodusdb,exodusdb/exodusdb,exodusdb/exodusdb,exodusdb/exodusdb,exodusdb/exodusdb,exodusdb/exodusdb,exodusdb/exodusdb