strcmp[i](..., 'none') -> isNone

Used `isNone` everywhere.
R2014b bar objects

Mostly handled, only the colors remain way off.
For now, just the structure will have to suffice, as finding the "flat" color
(which is interpreted in the colormap) is not as straightforward as expected.
R2014 error bars
R2014b area fixed, "flat" color mode fixed