Allow methods such as set_points_smoothly() to accept iterators as input.

[ubaldot]

Consider the following example:

x = [0, 1, 2, 3]
y = [5, 2, 3, 7]
shape = mn.VMobject().set_points_smoothly(list(zip(x,y)))

It would be nice if methods such as set_points_smoothly() would take iterators as input, e.g. the last line of the above snippet could be shape = mn.VMobject().set_points_smoothly(zip(x,y)).

[MrDiver]

In Progress