Show protein as either cartoon or surface

[sverhoeven]

Now the protein is always showed in cartoon representation it would be nice to show protein as a electrostatic colored surface. This will show more easily where the ligand is close to the protein.

[sverhoeven]

To get surface to show in the current app use the following workaround:

1. Open debugger
2. Open JS and pretty print
3. Find definePocket function and place a breakpoint
4. Change the pocket radius slider in gui sidebar

// replace cartoon with surface
this.model.removeRepresentation(this.model.reprList[0])
this.model.addRepresentation("surface", {colorScheme:"electrostatic", surfaceType:"av", sele: "not ligand"})

Disable breakpoint