Django-xross

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* IMPORTANT: xross.js changed naming conventions from pythonic to js.
* Fixed incompatibility with function-based views.
* Fixed operation function/method required `xross` argument.
+ ajax: forms now are checked on validity before data is submitted.
+ ajax: added `xrossajaxafter` and `xrossajaxbefore` events for xross elements.

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* IMPORTANT: xross expects GET by default.
+ xross_listener() now accepts `http_method` param.

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Has not been released.

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+ `xross_view` decorator improved for inherited class-based views.
+ Added two success actions: remove, empty.
+ Implemented simplified response return from operations (str and dict).
* Fixed requirements in docs (Python 3.3+).
* Empty responses made allowed.

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+ ajax: implemented `complete` support.
+ ajax: implemented `error` support.
+ implemented `by-path` function search (xross.utils.getFunction)

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+ Added minified version.
+ ajax: added `op` param.
+ ajax: `form` param now accepts an object.
* ajax: `request_type` param renamed into `method`.