td add to do something      # add a task
td a to do something
td + to do something
td done to do something     # finish a task
td d to do something
td ! to do something
td remove to do something   # remove a task
td r to do something
td - to do something
td list                     # list queued tasks
td .
td
td history                  # list all done tasks
td h
td clear                    # clear all lists
td c