FYI, whatever we did to try to deprecate task does not work in my repo when I update:

File "/Users/zundel/Development/java/squarepants/src/main/python/squarepants/plugins/compile_prep_command/tasks/run_compile_prep_command.py", line 12, in <module>
    from pants.backend.core.tasks.task import Task
ImportError: No module named task
...

Exception message: Failed to load the squarepants.plugins.compile_prep_command.register backend: No module named task