Add tests for utf 16/32
Add tests for utf 16/32

mrocklin/dask,gameduell/dask,cpcloud/dask,mrocklin/dask,blaze/dask,ContinuumIO/dask,vikhyat/dask,mraspaud/dask,jakirkham/dask,jcrist/dask,mikegraham/dask,jcrist/dask,jakirkham/dask,cowlicks/dask,pombredanne/dask,dask/dask,blaze/dask,pombredanne/dask,vikhyat/dask,dask/dask,mraspaud/dask,ContinuumIO/dask,chrisbarber/dask