Cleaned up names in BinaryOperator.
Cleaned up names in UnaryOperator.
Propagated operator name changes.
Added synthdeftools.Op.

Op will act as an interface for all exotic binary and unary ugen operators:

    >>> ugen = ugentools.DC.ar(60)
    >>> hz = synthdeftools.Op.midi_to_hz(ugen)
Adjusted operator names in Op.