The `bot` module provides access to the
bot hardware (note: with the exception
of `screenColor`, these work only on an
actual bot, not on the Home Computer).

Read-only properties:
 `bot.position`: current tile position
 `bot.facing`: 0=north, 1=east, etc.
 `bot.energy`: energy left (0-270)
 `bot.inventory`: list of items carried
 `bot.here`: same as `bot.position.area`
 `bot.ahead`: info on tile ahead of bot
 
Read/write properties:
 `bot.currentToolIndex`: selected item
 `bot.statusColor`: color of status light
 `screenColor`: screen background color
   (works on Home Computer too)

Methods:
 `bot.forward`: move forward 1 tile
 `bot.left`: turn left
 `bot.right`: turn right
 `bot.select toolNameOrIndex`: choose item
 `bot.placeItem`: place item down
 `bot.takeItem`: take item from chest
 `bot.harvest`: harvest a crop/item
 `bot.useTool`: apply current tool
 `bot.clearAhead`: choose/apply tool
 `bot.clearAndMove`: clear ahead and move
   (optionally specify # of tiles)

Note that each bot must be given a
suitable set of tools for the tasks you
program them to do.
