Cosimo Lupo d82a31dd57 return NotImplemented from __ne__ if __eq__ returns NotImplemented
otherwise `not NotImplemented` (always False) is returned from __ne__ when `type(self) != type(other)`, leading to illogic results like:

>>> from fontTools.ttLib.tables.DefaultTable import DefaultTable
>>> t = DefaultTable('test')
>>> t == 0
False
>>> t != 0
False

The latter of course should return True.
2016-03-11 15:10:50 +00:00
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