new simple _examples/README.md, wiki should live only inside kataras/iris/wiki and the provided e-book

Former-commit-id: 350eafb0f70f8433e394e103ff93fa332ee00a05

_examples/dependency-injection/sessions/routes/index.go

@@ -0,0 +1,17 @@
+package routes
+
+import (
+	"fmt"
+
+	"github.com/kataras/iris/v12/sessions"
+)
+
+// Index will increment a simple int version based on the visits that this user/session did.
+func Index(session *sessions.Session) string {
+	// it increments a "visits" value of integer by one,
+	// if the entry with key 'visits' doesn't exist it will create it for you.
+	visits := session.Increment("visits", 1)
+
+	// write the current, updated visits.
+	return fmt.Sprintf("%d visit(s) from my current session", visits)
+}