Include read paremeters by reference of functions

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>
Change symbol table to work as stack

Change symbol table to work as stack to allocate
dynamic memory.
Include global vars.

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

Include function to initialize global vars.
Include function to print symbols table.
Include function to initialize symbols table.
Include function to add and remove symbols
on the symbols table.
Change function "procura_simb" to work on the
stack symbols table.

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>
Change way to work with symbols table

Change function that work with symbols table.
Include insertion of "nivel lexico" and "deslocamento".
Need add stack for "deslocamento".

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>
Update test to check add stack symbols table

Check stack symbols table and add to "nivel lexico"
and "deslocamento".

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