adding eslint and precommit prettier hooks (#275)

Author: wuweiweiwu

.eslintrc

@@ -0,0 +1,14 @@
+{
+  "parser": "babel-eslint",
+  "plugins": [
+    "react"
+  ],
+  "extends": [
+    "fbjs",
+    "eslint:recommended",
+    "plugin:prettier/recommended"
+  ],
+  "rules": {
+    "no-console": 0
+  }
+}