Overhaul colorbar function. Colorbar now accepts an input colorbar handle or an input axis and will act appropriately. Updated docstring. Added Matlab compatible options "hide" and "delete". Stopped random failures by deleting all listeners when cbar is deleted. Added listener to monitor SIZE of colormap. Cleaned up coding style. Used less vague internal variable name __cbar_hax__ instead of __my_handle__ for out-of-band communication with __actual_axis_position__.m. * scripts/plot/colorbar.m: Colorbar now accepts an input colorbar handle or an input axis and will act appropriately. Updated docstring. Added Matlab compatible options "hide" and "delete". Stopped random failures by deleting all listeners when cbar is deleted. Added listener to monitor SIZE of colormap. Cleaned up coding style. Used less vague internal variable name __cbar_hax__ instead of __my_handle__ for out-of-band communication with __actual_axis_position__.m. * scripts/plot/private/__actual_axis_position__.m: Rename __my_handle__ to __cbar_hax__ for clarity.