Use keyword arguments instead of variable length argument list

[chiplet]

In a recent discussion with @mkosunen it was brought up that keyword arguments **kwargs should be preferred instead of using *args. This project still uses the *args for entity/controller initialization in at least the following locations:

inverter/inverter/__init__.py

Line 51 in c848bb0

def __init__(self,*arg):

inverter/inverter/controller.py

Line 15 in fff15a8

def __init__(self,*arg):

[mkosunen]

This is kind of embarassing. I think this is the only occasion where I have done this, the first hack just to get it to work, and it just have not been changed. That first argument is supposed to be parent instance, if it is given.

But you are right, we should change it, and now we shoud figure out how to do it so that the change is backwards compatible and does not break every entity ever written for thesydekick :)

[Roenski]

Could you just use both? Keyword args are named arguments anyways, so they shouldn't break the variable length arguments.

def __init__(self,*arg,**kwargs):