[yt-dev] Move sanitization routines into coordinate handlers?

[Matthew Turk]

Hi all, especially Nathan,

What do you think about moving the functions:

get_sanitized_center
get_sanitized_width
get_window_parameters
get_oblique_window_parameters

into the coordinate handler (ds.coordinates)?  This would make it
easier to implement them more carefully and clearly for the different
coordinate systems, like spherical, cylindrical, etc.

-Matt