Merge pull request #1 from Protossoario/master

Correccion reglas de identificadores
Fixed indentation problem in filtro()
Removed extra letters, it now works just for the vowels as the problem requested.
Added parser.py from blackboard... must start modyfing code to accept Functions and parameters
Removed special chars from comments so that it could compile.
Tried to add functions... still very buggy.
Tried to add functions... still very buggy.
Fixed something of the past grammar.
Added names to file... I think I solved all problemas in the past commit XD
Mi nombre :D