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.
I think the problem he faced was the same that I faced when fixing Centroid.

Check the import I did in https://github.com/faitdivers/pyao/blob/master/src/Centroid/test_centroid.py