initial commit after renaming.
some ideas revisited, initial backordering feature.
add Twig extension.
twig engine configuration file.
interfaces revisited.
change inventory unit to mapped super class.
missing argument for creation of inventory units, set created at for every unit.
Use new resource bundle
Fix wrong resolver service definition
Fix interface constant in operator
Fix stockable id on inventory units
Replace the StockResolver with AvailabilityChecker, introduce specs
Add sku accessor and state checkers in inventory unit model
Fixed minimum-stability in composer.json, removed unused use statements.
Inventory backorders.
Added InventoryChangeListener
Doc tweaks
CS fixes
Added default Stockable model
Update .travis.yml