Jsonte

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* Update README, setup.py and tox.ini to indicate Python 3.5 support.

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* Bugfix: fix an issue when _one_shot was used in iterencode in non-2.6 versions of Python

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* Major reworking
- Make jsonte a module rather than a package, since the scope is small enough to do so.
- Remove top level functions and put the core functionality into a class that is instantiated.
- Allow a custom objecthook to be used.
- Allow the ability to enforce json 'websafety' through raising an exception or prefixing the string.
- Allow additional type serialisers to be added in any order (subclasses no longer need to go first).
- Support for Python 2.6, 3.3 and 3.4 (as initially just 2.7)

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* Base SerialisationDict on a separate a mixim class to provide more flexability.

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* Rename JsonteDict to SerialisationDict to add clarity.
* Give access to the registered type classes.

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* Initial version