Squashed commit of the following:

    apps/graphics/ft80x:  Add support for accessing graphics ram.  apps/examples/ft80x:  Add more primitive graphics demos.
    apps/examples/ft80x:  Add a couple more demos of primitives.  Use new ft80x_dl_create() to simplify.
    apps/graphics/ft80x:  Add ft80x_dl_create() which simplies writing of very simple display lists.