Organize class methods and functions

[tblazina]

Currently there is no order of how methods appear, for example, within the TensorBase class and in math.py. There is no strict convention for organizing methods and functions but a general pattern to follow would be:

class SomeClass(object):
    def __magic_methods__(self):
        "magic methods first, usually in alphabetical order"
    def _private_method(self):
        "worker methods next, also in alphabetical order"
    def a_method(self):
        "then normal methods, also in alphabetical order"`

[tblazina]

annnd... i'll take this one