Horseman

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Major update.

* Simplified the parsing `Data` class by dropping the attempts at
mimicking `MultiDict`. Parsing no longer separate files from form
data and values are stored as a list of tuples containing (name, value).

* `FormData`, `TypeCastingDict` and `Query` classes were removed.

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* Multipart parser no longer adds empty values to the form multidict.

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* Fixed `FormData.to_dict` to handle empty or false values.

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* PATH_INFO is no longer expected to be there in the environ.
Some WSGI Servers do NOT provide it if empty.
* Added path normalization in the Node `__call__` to avoid malformed
path info.

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* First upload on pypi. Stable 0.2.

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* Initial release.