añadido pos_product_available desde odoo app

https://apps.odoo.com/apps/modules/12.0/pos_product_available/

pos_product_available/doc/changelog.rst

@@ -0,0 +1,46 @@
+`1.1.1`
+-------
+
+- [FIX] product qty available wrong rounding and overrided 'get_price' method in pos.js
+
+`1.1.0`
+-------
+
+- **New:** Added option to show product quantities
+
+`1.0.7`
+-------
+
+- **Fix:** Non rounded long values of quantities
+
+
+`1.0.6`
+-------
+
+- **FIX:** Added compatibility with pos_multi_session
+
+`1.0.5`
+-------
+
+- **FIX:** Product quantities representation according to the set location
+- **FIX:** Product quantities representation only for stockable products
+
+`1.0.4`
+-------
+
+- [FIX] incorrect products quantity numbers with pos_cache module.
+
+`1.0.3`
+-------
+
+- [FIX] compatibility with pos_cache module. Thanks to MindAndGo.
+
+`1.0.2`
+-------
+
+- [FIX] update product counter when sale via invoice
+
+`1.0.1`
+-------
+
+- Show quantity related to POS's stock location only.