new file:   _posts/2012-11-12-guang-gun.md
	new file:   _posts/2013-01-10-raspberry-pi.md
	new file:   images/guanggun/guanggun1.png
	new file:   images/guanggun/guanggun2.png
	new file:   images/guanggun/guanggun3.png
	new file:   images/guanggun/guanggun4.png
	new file:   images/guanggun/guanggun5.png