fix
Incident #19550 - added SaleType model and collection.  Commented out schedule date from quote workspace for now.
Incident #19550 - added taxCode and taxType models/collections
Incident #19550 - added ItemSiteRelation and collection
Incident #19550 - fixed some problems
Merge pull request #63 from mikerodonnell89/19550

added SaleType, TaxCode, TaxType, and ItemSiteRelation models and collections