Add tracking URL handling.
Minor fixes.
Replace all select-model="true" (not working any more) by select-model="{editable: true, abstract: false}" in document picker declarations.
Get variant stock data in ProductVariantPresentation and use it in template to show the variants that can be added to cart.
Better logout handling in admin panel.
Merge pull request #1065 from intportg/dev

Dev (trackingUrl, select-model, variant stock data, logout)