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* fix a bug when exporting for phy in dense mode
* compatibility with numpy 1.12
* fix a regression with artefact removal
* fix a display bug in the thresholds while previewing with a non unitary gain
* fix a bug when filtering in multi-files mode (overwrite False, various t_starts)
* fix a bug when filtering in multi-files mode (overwrite True)
* fix a bug if matlab gui (overwrite False)
* fix the gathering method, not working anymore
* smarter selection of the centroids, leading to more clusters with the smart_select option
* addition of a How to cite section, with listed publications
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