New treatment to include parcels

Today parcels is treated this way:

  - Put total value in Value field;
  - Click in Parceled Buy;
  - Inform initial parcel;
  - Inform total parcels.

System will calc with this formula: value = total value / total parcels.

New way will be:

   - Click in Parceled Buy;
   - It will open Parceled Buy screen;
   - Inform value and your type (total value or parceled value;
   - Inform initial parcel;
   - Inform total parcels;
   - Click in Generate;
   - It will make a parcels list, with parcel number, parcel date and parcel value, and total in final;
   - User will can change pay date, parcel value and, if is credit card type, inform which month will be paid.

Then, in database will necessary create more tables with parcels info.

   - Transaction table
     * Drop parcel and totalparcels field.
   - Parcels table
     * Create transaction code field;
     * Create parcel number field;
     * Create parcel value field;
     * Create pay date field;
     * Create credit card pay field;