Merge pull request #79 from Darthfett/master

Updates to quitting
emit chunk updates properly
emit events for block actions
refactor block actions into separate plugin
add physics. start with gravity

Also:

 * add jumper example, jumps whenever you chat
 * fix `game` event to fire correctly
 * add `respawn` event which fires when you die or change dimensions
 * Block instances have a `boundingBox` property, which is currently either
   `solid` or `empty`.
bot.game reserved for game settings

 * `bot.game.spawnPoint` moved to `bot.spawnPoint`.
 * `bot.game.players` moved to `bot.players`.
fix broken test
refactor tests
gravity is working and tested
fix jumping
update documentation
add the rest of the controls
Merge branch 'physics'

Conflicts:
	doc/api.md
Release 0.0.6
update README
add time api
expose entities map. closes #80
add bot.look and bot.lookAt API
add test for setting position to jumper
Release 0.0.7