Display basic overview and surface plots.
Add roi to overview.
Display 3d surface of roi region.
Roi boundaries are displayed in the info pane.
Change default camera position.
Calculate statistic values for surface plot.
Fix gui problems.
Add surface plotting capability.

Plugin can plot complex and real matrices. Absolute value of complex
matrix is calculated. Two plots are shown: overall heat map and a
surface view of selected region of interested. Right side pane
displays: cursor position inside overview window, data value and
statistical information about data inside roi.