def follow(self, taskspec):
taskspec.connect(self)<EOL>
Make this task follow the provided one. In other words, this task is
added to the given task outputs.

This is an alias to connect, just easier to understand when reading
code - ex: my_task.follow(the_other_task)
Adding it after being confused by .connect one times too many!

:type  taskspec: TaskSpec
:param taskspec: The task to follow.