erling6232/imagedata: Release 3.0.0rc5

Abstract

<ul> <li>imagedata.format.niftiplugin: Corrected writing 4D images.</li> <li>Series.show() and Series.get_roi() take an <code>ax</code> argument to show image in existing matplotlib Axes.</li> <li>Series.get_roi() takes an <code>onselect</code> callback function which is called when the ROI is modified.</li> </ul&gt