Ok findViewWithTag domato, ora c'è da scrivere il metodo onclick
Merge branch 'boringXMLLayout' of https://github.com/mpao/MagicSquare into boringXMLLayout

Conflicts:
	bin/MagicSquare.apk
	bin/classes.dex
	bin/classes/io/github/mpao/magicsquare/Casella.class
	bin/classes/io/github/mpao/magicsquare/MainActivity.class
	bin/classes/io/github/mpao/magicsquare/R$id.class
	bin/classes/io/github/mpao/magicsquare/R$layout.class
	bin/classes/io/github/mpao/magicsquare/R$menu.class
	bin/classes/io/github/mpao/magicsquare/R$string.class
	bin/classes/io/github/mpao/magicsquare/R$style.class
	bin/resources.ap_
	gen/io/github/mpao/magicsquare/R.java
	res/layout/activity_main.xml
	src/io/github/mpao/magicsquare/Casella.java
	src/io/github/mpao/magicsquare/MainActivity.java
	src/io/github/mpao/magicsquare/SquareLayout.java