Merge pull request #93 from COMP231-S62G1/Angela

Angela
Merge branch 'Release02'

* Release02:
  1. Update database price column from decimal(3,3) to decimal(6,2) 2. Update all server Interface file to include dbConnector.php file rather than define mysql connection by themselves
  Add HST and total amount calculation service static class
  Shopping cart to accept prices
  add price to menu list
  Add price info in MenuItem bean
  Update Confirmation UI to accept pricing
  Vendor Menu Editing UI
  Retrieve current cart
  GUI Shopping Cart
  send order notification to consumer document
  edit cart documentation
  save updated cart