Merge pull request #343 from haramrit/dirty

Monthly Register renamed to Service Tax Statement
Minor updates in register and bill display
Merge pull request #344 from aseemmittal/dirty

Minor updates in register and bill display
Modifies proforma bill and changes icon for non-payment order
Merge pull request #345 from aseemmittal/dirty

Modifies proforma bill and changes icon for non-payment order
changes text size for bills.
Merge pull request #346 from jasvir99/dirty

changes text size for bills.
Updation in Main Register