Http API Usage:

	/200.png - 200x200 png image with default color and text
	/100x150.png?bg=fff&fg=a52a2a - 100x150 png image with white background and brown frontcolor
	/200.png?t=text&bg=fffa&fg=0002 - 200x200 png image with translucence background/frontcolor (not recommended) and custom text writen

fg and bg cant be "random" or "transparent"(same as "0000").