Added support for reading .MAT files as images. conv_img and stack2mrc automatically gain support for reading from .MAT files. No way to specify the image name within the file however, but it works great if there is only one image.
Switch HNS from using Mojtaba's old segmentation code to his new one (CHM).
Merge branch 'master' of github.com:coderforlife/py-seg-tools