[Issue#81]: This way of discarding variables not used is failing when function are nested, or there is declaration of interfaces

[Issue#81]: Now that all the variables have the correct module assigned, this member can be used safely.

i[Issue#81]: When a real has been declared without prec specification, we suppose is a single prec real

[Issue#81]: Old pattern was matching with function_somthing, i.e. with lines that were not containing functions declarations

[Issue#81]: Fix for structure that were identified as functions passing vault and using new is_call_to_functions.

Reformulated is_call_to_function to use the vault information in our advantage. Now we need to pass the current routine as an argument to calls_to_functions.