Release version 2.0.0-beta1
Release version 2.0.0-beta1

This fixes the scifio dependencies at 4.4-imagej-2.0.0-beta1,
fixes the ImgLib2 dependency at 2.0.0-beta1, and fixes the ImageJ1
dependency at 1.46j.

This used to be revision r5261.

imagej/workflow-pipes,imagej/workflow-pipes