I followed these instructions (except for copying the executable to my PATH because I cannot seem to find it and it does not seem necessary). Then I made a file called image
FYI to Windows users upgrading to version 2.0.0 - the executable has moved. In addition to changing your PATH environment variable to 2.0.0, you'll need to add \bin to the end of the PATH that you had for the 1.x.x.