Include options in the configuration to change which function keys to use for shutdown and reboot.
Fix config.map_len size in src/config.c.
Add missing defaults in config_defaults() in src/config.c.
* Added a big clock
* fixed clock timing when animation is turned off
* fix memory leak and segfault
* rename clock to bigclock
* Added formattable clock
* fix clock position on first draw
don't rely on box_x and box_y to position the clock, because it might not be initialized in the first frame.
* fix memory leak
