remove 'all' commands

[danielasun]

Just realized that we could potentially cut down on the function length by changing the id parameter to be an optional keyword argument and have the function figure things out automatically.

It's an option, not necessarily a good one.

[TMengi]

Do you want me to go through with this one?

Here's how I would try to handle it:

1. Find and replace every call to an 'all' function with a call to the regular function
2. Make ids into an optional argument. Default value is None, and triggers an assert that length of commands equals length of motor ids.
3. Write a regular expression to fix driver code (e.g. replace "set_command_position([1,2,3,4], [pi,pi,pi,pi])" with "set_command_position(angles=[pi,pi,pi,pi], ids=[1,2,3,4])").
4. Test, delete 'all' functions, test some more.

[danielasun]

let's hold off on this one for now. I want to make sure that we successfully finish some of the other pull requests first.