pgm 16.2 - split src/inventory.c into files ready for refactoring into a more testable form; added make rules
pgm 16.2-4 breaking inventory code into model and view for testability and the sheer joy of overengineering
pgm 16 2-4, can insert and query DB (5 tests, 22 assertsions!)
pgm 16.2-4 inventory: database model is CRU complete, tested, and ready to be used by the view