adding an upfront sub order that inherits from suborder which inherits from order
upfront sub order is able to correctly upload to qb for initial transaction
upfront sub order will know be able to save down to qb correctly for subsequent orders
setting up controller to correctly save the right line items if it is an upfrontsuborder
Merge pull request #59 from SunnyIzr/creating-upfront-qb-methods

Creating upfront qb methods