Change struct "rotulos" to work with any stack string

Change struct "rotulos" to work with any stack string.
Change name global var "nome_proc_func" to
"nome_var_proc_func".

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>
Change functions to work with stack "rotulos"

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>
Correct way to read vars, procedure, function and expression

Correct way to read vars togetter with procedures and
function on the expression.
Algoritmo can diference between var, procedure and
function generated MEPA code.

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>
Execute make

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>