Interface for qBeta module object

Origin: OOPM

OneCustomerBankSys: obj
   -- Things to be fixed
   -- -> Real not implemented
   -- return not implemented
   -- qBeta use float not real
   %visible StringLib
   Account_1010: obj
      owner: ref String
      balance: var float
      interestRate: var float -- real
      addInterest:
      deposit: -- -> real:
         out NB: var float
      withdraw: -- -> real:
         out NB: var float
   command: ref String
   amount: var float
   newBalance: var float