added prettier, removed seperate react eslint config, fixed missing

component display name Markdown.js, and added run method to app

.eslintrc.json

@@ -1,29 +1,27 @@
 {
-  "env": {
-    "es6": true,
-    "node": true,
-    "mocha": true
-  },
+  "parser": "babel-eslint",
+  "plugins": [
+    "react"
+  ],
   "parserOptions": {
-    "ecmaVersion": 2017
+    "ecmaVersion": 6,
+    "sourceType": "module",
+    "ecmaFeatures": {
+      "jsx": true
+    }
   },
-  "extends": "eslint:recommended",
+  "env": {
+    "es6":     true,
+    "browser": true,
+    "node":    true,
+    "mocha":   true
+  },   
+  "extends": [
+    "eslint:recommended", 
+    "plugin:react/recommended"
+  ],    
   "rules": {
-    "indent": [
-      "error",
-      2
-    ],
-    "linebreak-style": [
-      "error",
-      "unix"
-    ],
-    "quotes": [
-      "error",
-      "single"
-    ],
-    "semi": [
-      "error",
-      "always"
-    ]
+    "react/prop-types": 0,
+    "react/react-in-jsx-scope": 0
   }
 }