Scanner work. Missing literals.
Literals parsed
Add comments to the lexer, and a small test for it.
Inserido código no Scanner.l, falta código de inserção na tabela hash (dicionário).

Conflicts:
	scanner.l
Merge branch 'master' into stage_1
Merge branch 'stage_1' of github.com:trbecker/comp-2014-1 into stage_1
Fills the literal table with the literals by the scanner.
Symbol (literal) table now only prints in debug.
Small fixes on the scanner.

  Ignore white spaces and tabs characters
  Recognizes only single chars or escaped chars between single quotes.
Eliminate quotes when storing string and chars.
Include standard tests.

All passing.
Merge branch 'master' into stage_1