Ability to email and print statements to customers

Added ability to create, email and print statements with specified periods for the Customer

Customers-> Statement button-> Create Statement popup

After setting up the parameters on the popup and clicking on the Print button PDF file is generated.

• Transactions for the current and past periods are displayed on the PDF file screen.
• Transaction list includes:

1. 1. 1. 1. 1. 1. Invoices (positive)
               2. Payments (negative)
               3. Credits (negative)
               4. Check refunds (positive)
               5. Change Given (positive)
               6. Discounts (negative)