creating new branch for dm

The branch includes test file (test.py). It works fine if we use the test file (with given lenslet position). However, calling it from main.py still needs parameters from others. Furthermore, the dm function now requires additional parameter (paramsActuator) in order to work.
Actually what we want in the end is a flexibility to place it arbitrarily. However, for to simplify the calculation, I intentionally make this assumption