Feature request: Arbitrary Colour map control for surface colouring

[gdevenyi]

Arbitrary colour maps for surfaces (as well as threshold control) would be helpful for displaying statistics on surfaces.

[gdevenyi]

Now that vertex-wise data is available on surfaces, and I see I can choose one of the default colour maps, it would be nice if I could load arbitrary ones as well.

[rdvincent]

Sure. For now it will probably use the same colour map as the custom voxel data map.

[gdevenyi]

That would work fine for me.

[gdevenyi]

Fixed in develop