updates for firmata changes
update hybridgroup-firmata to 0.4.2
updated examples and button and led drivers
update firmata gem version
motor example
servo example
led drivers tests
forgot to add off? to the list of commands
Revert "update firmata gem version"

This reverts commit 2d43d187c243352a91fd2d8f34c6ae264b11af9f.
add line to Gemfile to use local hybridgroup-firmata gem (it's commented out by default)
add Rafael Magaña as author
artoo-arduino instead of artoo-sphero on Gemfile
Update dependencies
Merge branch 'master' into updates-for-firmata-changes

Conflicts:
	Gemfile.lock
	artoo-arduino.gemspec
	examples/firmata.rb
Update version
Add wiichuck example
use firmata's read_and_process method
Merge branch 'updates-for-firmata-changes' of github.com:hybridgroup/artoo-arduino into updates-for-firmata-changes
handle pin_state events
Update evented led driver