add var = Var() to coretypes
add var = Var() to coretypes

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