Uberdict

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* doc changes to get description formatted correctly on both github and pypi

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* support python 2.7 and 3.4+, as well as pypy (pypy2 and dev 3.5 pypy)
* 100% test coverage
* making available on pypi

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* added support for `dir` method to improve interactive use (exposes stored keys as well as the normal instance and class attributes that would be expected)
* updates to ensure that `__missing__` is only used from `__getitem__`, and never from methods like `get` or by inadvertently using `__getitem__` from another method
* more tests

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* main class is now 'uberdict.udict' (was 'uberdict.UberDict')
* changes to how dotted keys are handled (dots have no special meaning for 'getattr', 'setattr', 'hasattr', 'delattr' but do for 'get' and '__getitem__' and friends)
* improved README docs and examples
* more tests