add a new 'overview' MVC example

Former-commit-id: f73cbf6010595c639f6c5b5119e2ec41bc9802a5

_examples/mvc/repository/datamodels/movie.go

@@ -0,0 +1,18 @@
+// file: datamodels/movie.go
+
+package datamodels
+
+// Movie is our sample data structure.
+// Keep note that the tags for public-use (for our web app)
+// should be kept in other file like "web/viewmodels/movie.go"
+// which could wrap by embedding the datamodels.Movie or
+// declare new fields instead butwe will use this datamodel
+// as the only one Movie model in our application,
+// for the sake of simplicty.
+type Movie struct {
+	ID     int64  `json:"id"`
+	Name   string `json:"name"`
+	Year   int    `json:"year"`
+	Genre  string `json:"genre"`
+	Poster string `json:"poster"`
+}