Log Message:
Update to version 3.0.1
Change homepage

3.0.1
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- Made Executor.map() non-greedy

3.0.0
=====

- Dropped Python 2.5 and 3.1 support
- Removed the deprecated "futures" top level package
- Applied patch for issue 11777 (Executor.map does not submit futures until
                                 iter.next() is called)
- Applied patch for issue 15015 (accessing an non-existing attribute)
- Applied patch for issue 16284 (memory leak)
- Applied patch for issue 20367 (behavior of concurrent.futures.as_completed()
                                 for duplicate arguments)