Restructure folders (#411)

graphql/juniper/README.md

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+# Juniper
+
+[Juniper](https://github.com/graphql-rust/juniper) integration for Actix web.
+If you want more advanced example, see also the [juniper-advanced example].
+
+[juniper-advanced example]: https://github.com/actix/examples/tree/master/juniper-advanced
+
+## Usage
+
+### server
+
+```bash
+cd examples/juniper
+cargo run (or ``cargo watch -x run``)
+# Started http server: 127.0.0.1:8080
+```
+
+### web client
+
+[http://127.0.0.1:8080/graphiql](http://127.0.0.1:8080/graphiql)
+
+_Query example:_
+```graphql
+{
+  human(id: "1234") {
+    name
+    appearsIn
+    homePlanet
+  }
+}
+```
+_Result:_
+```json
+{
+  "data": {
+    "human": {
+      "name": "Luke",
+      "appearsIn": [
+        "NEW_HOPE"
+      ],
+      "homePlanet": "Mars"
+    }
+  }
+}
+```
+
+_Mutation example:_
+
+```graphql
+mutation {
+  createHuman(newHuman: {name: "Fresh Kid Ice", appearsIn: EMPIRE, homePlanet: "earth"}) {
+    id
+    name
+    appearsIn
+    homePlanet
+  }
+}
+```
+
+_Result:_
+```json
+{
+  "data": {
+    "createHuman": {
+      "id": "1234",
+      "name": "Fresh Kid Ice",
+      "appearsIn": [
+        "EMPIRE"
+      ],
+      "homePlanet": "earth"
+    }
+  }
+}
+```