View wasn't set correctly
Add contour drawing
Doc formatting
Add the ability to control the legend/label of the contours and fix cntrparam bug
'show contour' was unnecessary. Rearrange the code to make plots cease disappearing
Allow specification of a terminal for the examples.

This required a change in the semantics of Figure... now it copies the
terminal/output file.
Clean up the examples a bit
Document Axes3D
Mention some 3d features that are available