Finished experiment

The program now diplays an assortment of random glyphs, of random
colors, blitted from the spritesheet onto the screen once a second.

Techniques demonstrated:
					 * Sprite blitting
					 * Transparency settting via colorkey
					 * Sprite shading
					 * Random number generation
					 * Timer
					 * Using a back buffer.
Added README.md and license
Merge remote-tracking branch 'origin/master'

Conflicts:
	source/app.d