Graidle: Generate graphical diagrams

This package can be used to generate several types of graphical diagrams.

There are several classes specialized in generating histograms,spider, pie charts and line (filled) charts.

Several presentation aspects may be configured like the colors, labels, axis, etc..

The diagrams are generated as true color images using the GD library functions, and can be displayed as the current script output or saved to a file in the PNG format.