https://github.com/uwdata/vegalite/issues/228
https://github.com/uwdata/vegalite/issues/228

mkirchstein/voyager,sandbox/voyager,mkirchstein/voyager,vivekratnavel/voyager,vivekratnavel/voyager,jsanch/voyager,uwdata/voyager,hortonworks/voyager,pallavkul/voyager,vivekratnavel/voyager,pallavkul/voyager,hortonworks/voyager,mkirchstein/voyager,uwdata/voyager,jsanch/voyager,sandbox/voyager,pallavkul/voyager,jsanch/voyager,uwdata/voyager,sandbox/voyager,hortonworks/voyager