Align_RGB_planes plugin update

[Gabriel Landini]

Hi,
I have updated the Align_RGB_planes plugin so now it can deal with stacks.
A set of buttons to move across the stack will appear in the dialog panel when
dealing with stacks, but will be hidden if dealing with single images.

http://www.dentistry.bham.ac.uk/landinig/software/software.html

Let me know of any problems.
Regards,

Gabriel