2011 Jan 7: Pyxplot 0.8.4

Summary:

This is a minor bugfix release.

Details:

• Two-dimensional parametric grid plotting implemented.

• Bugfix to the dots plot style; filled triangles replaces with filled circles.

• Bugfix to linewidths used when drawing line icons on graph legends.

• Bugfix to Makefile to ensure libraries link correctly under Red Hat and SUSE.

• Code cleanup to ensure correct compilation with -O2 optimisation.