update
Merge remote-tracking branch 'official/master'
modify stepper driver
update i2c device's interface
Merge remote-tracking branch 'official/master'

Conflicts:
	examples/Me_LedStripDriver/ColorLoop/ColorLoop.ino
	examples/Me_LedStripDriver/Indicators/Indicators.ino
	examples/Me_LedStripDriver/WhiteBreathLight/WhiteBreathLight.ino
	examples/Me_ServoDriver/TestServoDriver1/TestServoDriver1.ino
	examples/Me_StepperDriver/BackAndForth/BackAndForth.ino
Merge pull request #3 from xeecos/master

update i2c device's interface