To be compliant with Python standard and the way BLISS looks for modules.

avoid re-initialization.
Some cosmetic brush-up.

Modify all motors controller to be compatible with the creator signature.

Jose Tiago Macara Coutinho authored Mar 29, 2017 and Sebastien Petitdemange committed May 15, 2017

- add support for new communication configuration
- add deprecation warning if using original configuration

These decorator are generic and not linked to "axis" objects.
--> no more add_axis_method function
+tests :)

GalilDMC213: do not check for motor OFF state in home_search()

of several calls
implemented acceleration
implemented velocity
added velocity test