Create ac-3.txt

Atividade complementar 3 :  deadline: 05/Out/2014 23:59
simple clarification update

added (ac-3.txt) after this file
Atividade Complementar 3
Added template ac-4

latex template and pdf version para atividade complementar 4
Update ac-3.txt

Adicionar : Histórico de Alterações
Merge branch 'master' of https://github.com/chesteve/teaching-ea976 into AC-3

Conflicts:
	ac-3.txt
AC-4 Entrega