Add eslint-plugin-import to handle flow type imports

The built-in no duplicate rule for imports was breaking when I would
import from a file, then below that, import types from that same file.
It would incorrectly label the second import as a duplicate.

.eslintrc.js

@@ -15,7 +15,8 @@ module.exports = {
     },
     "plugins": [
         "react",
-        "flowtype"
+        "flowtype",
+        "import"
     ],
     "rules": {
         // Flow type rules:
@@ -26,6 +27,11 @@ module.exports = {
         "flowtype/space-after-type-colon": [ 2, "always" ],
         "flowtype/delimiter-dangle": [ 2, "always-multiline" ],
 
+        // ES6 Import rules:
+        "import/no-duplicates": "error",
+        "import/no-unresolved": "error",
+        "import/named": "error",
+
         // JS Rules:
         "indent": [
             "error",
@@ -85,7 +91,6 @@ module.exports = {
         "space-in-parens": ["error", "never"],
         "spaced-comment": "error",
         "generator-star-spacing": "error",
-        "no-duplicate-imports": "error",
         "no-var": "error",
         "prefer-const": "error",
         "array-bracket-spacing": "error",

package.json

@@ -49,6 +49,7 @@
     "eslint": "^3.10.2",
     "eslint-config-google": "^0.6.0",
     "eslint-plugin-flowtype": "^2.30.0",
+    "eslint-plugin-import": "^2.2.0",
     "eslint-plugin-react": "^6.4.0",
     "express": "^4.13.4",
     "fetch-jsonp": "^1.0.2",