remix_dimensions

File Purpose: dimensions in REMIX from mage.

Includes adding new Dimension: hemi? polar?

Classes

Hemisphere([s, i])	a single hemisphere, probably NORTH or SOUTH.
HemisphereDimension([v, values, on_set_v])	hemisphere dimension, representing current value AND list of all possible values.
HemisphereHaver(*[, hemisphere, hemispheres])	class which "has" a HemisphereDimension.
HemisphereList(*args_list[, istart])	list of hemispheres.