Create README.md

Author: shaleman

README.md

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+[![GoDoc](https://godoc.org/github.com/contiv/contivmodel/client?status.png)](https://godoc.org/github.com/contiv/contivmodel/client)
+
+# Contiv Object Model
+This is how current object model looks like:
+
+![Contiv Object Model](./contivModel.png "Contiv Object Model")
+
+### Using go client
+Here is an example of how to use contiv go client
+
+```
+package main
+
+import (
+    "log"
+
+    "github.com/contiv/contivModel/client"
+)
+
+func main() {
+    cl, err := client.NewContivClient("localhost:9999")
+    if err != nil {
+        log.Fatal(err)
+    }
+    
+    // Define a policy
+    policy := client.Policy{
+        TenantName: "tenant1",
+        PolicyName: "policy",
+    }
+    
+    // Create policy
+    err = cl.PostPolicy(policy)
+    if err != nil {
+        log.Errorf("Policy Creation failed. Err: %v", err)
+    }
+}
+```