Visualization

[yujanshrestha]

Implement visualization tools to aid debugging and algorithm development. For a first pass leverage hdav to visualize 3d volumes such as:

• Rasterized Mesh
• MRI voxels
• Segmentation labels

[orwonthe]

Client has asked for:

1. A way to modify the colormap (relevant if you are color blind, Koen Van Leemput is),
2. Visualialization of the bias field alone,
3. A cost function plot

[orwonthe]

1. ShowFIgures object will accept a palette. The default palette should work for both color blind and non-color blind viewers.
2. The bias field is now displayed.
3. A simple cost function plot is displayed.