Merge pull request #33 from diogodadalt/master

ILOC on going
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Merge branch 'master' of http://github.com/lucaslazari/compiladores

Conflicts:
	etapa5/src/tree/assignmentnode.cpp
modificação para empilhar "Nodes" de criação de novo escopo ao invés de hash tables
Merge branch 'master' of https://github.com/diogodadalt/compiladores
Changes in the management of registers and in the expression node