Add functional Hermite curves, curves script.

Add:
	src/graphics.(c, h)
		-add drawHermite(), which draws a Hermite curve.

	scripts/curves.gsc
		-add script to generate a face, using circles, Hermite, and Bezier
		splines.

	src/interpreter/interpreter.c
		-add commands to draw Bezier and Hermite curves.

	src/interpreter/file_parser.c
		-add 10 second usleep before evaluateScript() quits the screen, to allow
		some time for the user to observe the screen.