Refactor api_wrapper

[rrickgauer]

• create a new package for it
  • each sub-class gets its own file
  • create a new module in the package called common that contains:
  • the functions at the top of the page
  • RequestParms
  • ApiWrapperAbstract - rename this to IApiWrapper
  • ApiWrapperBase
  • the new URL constants enum described below
• create an enum that holds all the url constants possibly using the advanced enums library
• merge all the function parms into objects like url parms and form data
  • see this example

[rrickgauer]

Sub Classes

Class	Module File Name
ApiWrapperUsers	users.py
ApiWrapperProducts	products.py
ApiWrapperProductAvailability	product_availability.py
ApiWrapperProductImages	product_images.py
ApiWrapperSearchProducts	search_products.py
ApiWrapperListing	listings.py
ApiWrapperListingAvailability	listings.py
ApiWrapperPayments	payments.py
ApiWrapperRequests	requests.py
ApiWrapperRequestsSubmitted	requests.py
ApiWrapperLocations	locations.py
ApiWrapperPayoutAccounts	payout_accounts.py
ApiWrapperBalanceTransfers	balance_transfers.py
ApiWrapperPasswordResets	password_resets.py