R3:
	-Added horz_res(), vert_res(), char_line(), get_pixel(x,y)
		-horz_res/vert_res gets resolution of screen
		-char_line gets the number of characters that will fit on a line
		-get_pixel gets the status of x,y returns 1 for white 0 for black.
	-rewrote the line render functions
	-fixed bugs preventing changes in resolution and pixel scaling
	-automatically centers the screen vertically
	-added arduino mega support, untested
		-Sync pin:  pin11
		-Video pin: pin12
	-changing the redering resolution is now supported.
	 to do so change the virtical and horizontal resolution in video_properties.h
		-Note:
		 (_RESOLUTION_HORIZONTAL/8)*_RESOLUTION_VERTICAL
		 must be less than the amount of memory the arduino has.
	
R2 (May 2nd 2010):
	-Added PAL support:
		-to render in pal call  start_render(_PAL);
		-to render in NTSC call start_render(_NTSC);
	-centered video better.
	-reduced system to useing one interupt, this will allow for adding sound, and or
	 support for polling the UART/SPI/ect. once per scanline.
	-now renders full half frames(262 lines) instead of 255 lines for NTSC
	-modified fonts to be less horrid looking.
	-slightly faster line rendering.
	-Fixed issue with line rendering not working on last horizonal pixel
	-added support for pausing video; output still issues h sync
		-pause:  pause_render();
		-resume: resume_render();
		-This does cause a Vsync glitch for the first frame, recovers after
		 soon.
R1 (April 30th 2010):
	Initial release.