Oplot 0.5.0 released

Oplot 0.5.0 is released.

This release is a middle-release between 0.1 and 1.0. Please add and send me comments regarding improvements, and what's already nice.

* Improved positioning of viewport, but not perfect yet.
* Improved implemention of figure, axes, line, image, surface and patch.
* Added a lots of m-files that implements many plotting features in Octave, which is consistent and recognized by Matlab users.

* Improved mouse interaction.

Cheers,

Ole J. Hagen