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Merge branch 'master' of https://github.com/jesuschavolla/LAB_2

Conflicts:
	keypad.c
Merge branch 'master' of https://github.com/jesuschavolla/LAB_2
Merge branch 'master' of https://github.com/jesuschavolla/LAB_2
Merge branch 'master' of https://github.com/jesuschavolla/LAB_2
Merge branch 'master' of https://github.com/jesuschavolla/LAB_2
another version. again.
Merge branch 'master' of https://github.com/jesuschavolla/LAB_2
"final" version
Merge branch 'Garcia' of https://github.com/jesuschavolla/LAB_2