added heatmap plotting for max project :fire:
added heatmap plotting for max project :fire:

neurodata/ocp-journal-paper,neurodata/ocp-journal-paper,neurodata/ocp-journal-paper,neurodata/ocp-journal-paper,openconnectome/ocp-journal-paper,openconnectome/ocp-journal-paper,openconnectome/ocp-journal-paper,openconnectome/ocp-journal-paper