Add Abaqus' default rainbow colormap

See the discussion here. I hadn't considered adding this to ParaView source, but from the discussion figured I might as well get things started.

Note that I'm not sure what the complete syntax is for colormaps, but if possible these are a few other default settings for the colormap in Abaqus/CAE:

• Number of discrete values: 12 (user can modify, or ask Abaqus/CAE for "continuous" spectrum)
• Above range color: RGB: [204, 204, 204]
• Below range color: RGB: [51, 51, 51]

Just to show how the process I used:

• Here are the default contour settings for a contour plot in Abaqus/CAE

• Here are the default spectrum settings for a contour plot in Abaqus/CAE

• Clicking on the color icon for the Greater than max (or Less than min) options brings up a color selection dialog

• Opening the Spectrum Manager and editing the Rainbow spectrum pops up a dialog where double-clicking on each color pops up the same color selection dialog from above

Since ParaView's colormap editor takes floats in the range [0-1] for its RGB, while Abaqus provides integers in the range [0-255], here are the raw Abaqus RGB values that I translated into ParaView's values (from blue to red):

R	G	B
0	0	255
0	92	255
0	185	255
0	255	231
0	255	139
0	255	46
46	255	0
139	255	0
231	255	0
255	185	0
255	92	0
255	0	0

• I chose RGB: [255, 0, 255] for the NaN color since it doesn't appear in the rainbow and Abaqus/CAE doesn't have this concept, so isn't defined in Abaqus/CAE.