[Kavya] Added first and last name to User model

Conflicts:
	app/views/item_details/index.html.erb
[kavya]added paid_to column to payments table
[Pani] Calander Date navigation
[Pani] Moving back to old calander version
[Pani] Print Payment formatting changes
[Pani] updaated calander dropdown to show months
[kavya]Changed the position and name of paid to
[kavya]Adding Received by column in cashvoucher/receipt
[Pani] Fixed Calander Problem
[Pani] Completed Receipt and Cash Voucher
[Pani] PreSelect payment type from db
[Pani] Fixing payment error in pdf
[Pani] Added blank lines in cash voucher