- cange is_x functions from parser to procedures.
- use own version of isspace (to avoid locale issues).
- solved bug introduced when creating is_space: did not recognize spaces.
- changed "@def" to "@proc" in parser.
- change 'function' to 'procedure' in all code.
- add comment to auxiliar function.
- change mode char from C to 1 and 2
- eliminate option to '=='
- change while1 and while2's names to loop1 and loop2.