Updated rendering some more.

Using finer lines, otherwise it all looks a bit CGA.
Ran lcd_render.py through PEP8.
Changed font.

Had to left-justify the font to make proportional text work.
lcd_test is out of tree.
Added speedo code and power save mode.

Draws a pretty speedo.
Added an lcd off command to test power savings.
Ignore lcd_test temporaries.