Using e2.py

* [:EMAN2/Tutorials/Display:Display a test image, and an ordinary image]

* [:EMAN2/Tutorials/RotateTranslate:Rotate and translate an image]

* [:EMAN2/Tutorials/AddAndMultiply:Add images, and multiply by a constant]

* [:EMAN2/Galleries/Testimages:Generate a test image]