Several Plot3D improvements.

- Better iblank handling
- Added several more functions

Change-Id: I75d8713006b7cd17f6baf6012c88de21845d68df
Added the ability to report time in file.

Plot3D reader now reports the time value in the Q file
in RequestInformation.

Change-Id: I5ab5388284ce95f4ca3a337c16d12505ef5fb34b
Merge topic 'plot3d-improvements' into master

d977f577 Added the ability to report time in file.
bc9f3c1b Several Plot3D improvements.