This is the initial port of Python CairoPlot to C.

Classes:

-> LabelList (100%) 	-- Holds a list of labels, with the size, angle and color property.

-> Plot (10%) -- Abstract. Draws the background, bounding box and other tasks.
	-> BarPlot (10%) -- Draws a vertical or horizontal plot.
	
-> Handler (100%) -- Abstract. Handles the plot surface and cairo context. 
	-> PNGHandler (100%) -- For PNG output.
	
Boxed types:

-> Color (100%) -- Represents a RGBA color;