----------- * Potentially backward incompatible: Changed the way the urls options are put in the context. * add 'visible' attribute to `link()` and `action()` * add new custom tag `extraurl`
0.4
----------- * add css_class attribute
0.3
----------- * add ability to order buttons
0.2
----------- * python 3.3, 3.4 compatibility * add ability to customize the upload template * disable button after click to prevent double click * improved automatic button's label creation * it's not anymore mandatory to return a HttpResponse