Add maxtype function
Add maxtype function

quantopian/datashape,llllllllll/datashape,cpcloud/datashape,blaze/datashape,llllllllll/datashape,quantopian/datashape,cpcloud/datashape,cowlicks/datashape,blaze/datashape,ContinuumIO/datashape,cowlicks/datashape,ContinuumIO/datashape