Added readme for smart shelf application.

Signed-off-by: agrawalgaurav <gaurav.agrawal@huawei.com>
Change-Id: Ib69c763e2bcbe8bbcfb8d9470e04f494dfc8747e

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+# Smart Shelf Application
+
+This application is an entry level application to demonstrate Remote Office Branch Office usecase (ROBO) for Retail Enterprise for scenario wherein there is a retail chain comprising of multiple retail stores and a retail headquater. 
+The application provides Smart Shelf solution to monitor shelf's for a retail chain.
+
+Why Smart Shelf solution:
+Smart Shelf is a technological breakthrough that enhances the overall shopping experience and improves a store’s operational efficiency in terms of stock misplacement and notify empty shelves.
+ 
+Smart shelf benefits:
+- Smart Shelves can notify empty shelf for items when needed without requiring humans, making it easier to prevent
+ shortages of popular items at peak times.
+- Smart Shelves allow retailers to make more informed decisions about stocking and inventory, notify the back-end
+ system about the existing quantity of items on the shelves, alert when product levels are running low and when items are misplaced.
+- Provides access to the store or shelf information remotely, enables visibility of stock position, cross and up
+ selling of products.
+- Better customer experience with proper inventory for each shelf.
+
+Available Solutions:
+- Camera based with Video analytics solution
+- weight sensors/optical sensors based solutions
+This application is based on 1st solution
+ 
+Why Edge: 
+This use case demands for low latency, jitter for scenarios like theft detection, stock misplacement. 
+Currently available in-retail enterprise solutions, wherein in store deployment of compute/storage resources
+ are done, consumes store spaces and are not cost effective. 5G Telco edge based solution is a need here and this
+  application demonstrates the same.
+  
+This application is developed as part of Akraino EALTEdge BP using EdgeGallery as an upstream project. Kindly refer
+ below link to get more insights about this application:
+https://wiki.akraino.org/display/AK/EALT-EDGE+Landing+Application
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