Add ImageJ2-based MIJ

Created a new MIJ class that uses ImageJ2 instead of ImageJ 1.x.

To facilitate this we had to remove all ImageJ 1.x imports so modified
IJ 1.x classes can be loaded in a controlled way. The new IJ1Helper
facilitates this.
Deprecated old MIJ class

Moving to a MIJ in a non-default package.
Create integration test

Adds a test to try using MATLAB scripting from within MATLAB.