Use new ESLint filename (.json) (#2248)

* Use new ESLint filename (.json)

Codeclimate's ESLint 3 is complaining about the old filename. Let me try changing it.

* point eslint to new rc

(squash this)

.eslintrc.json

@@ -0,0 +1,79 @@
+{
+  "env": {
+    "browser": true,
+    "node": false,
+    "es6": true
+  },
+
+  "parser": "babel-eslint",
+
+  "plugins": [
+    "react",
+    "jsx-a11y"
+  ],
+
+  "parserOptions": {
+    "sourceType": "module",
+
+    "ecmaFeatures": {
+      "arrowFunctions": true,
+      "jsx": true,
+      "destructuring": true,
+      "modules": true,
+      "spread": true
+    }
+  },
+
+  "rules": {
+    "no-cond-assign": 2,
+    "no-console": 1,
+    "no-irregular-whitespace": 2,
+    "no-unreachable": 2,
+    "valid-typeof": 2,
+    "consistent-return": 2,
+    "dot-notation": 2,
+    "eqeqeq": 2,
+    "no-fallthrough": 2,
+    "no-unused-expressions": 2,
+    "strict": 0,
+    "no-catch-shadow": 2,
+    "indent": [1, 2],
+    "brace-style": 1,
+    "comma-spacing": [1, {"before": false, "after": true}],
+    "comma-style": [1, "last"],
+    "no-mixed-spaces-and-tabs": 1,
+    "no-nested-ternary": 1,
+    "no-trailing-spaces": 1,
+
+    "react/jsx-wrap-multilines": 2,
+    "react/self-closing-comp": 2,
+    "react/prop-types": 2,
+    "react/no-multi-comp": 0,
+
+    "jsx-a11y/accessible-emoji": 1,
+    "jsx-a11y/anchor-has-content": 1,
+    "jsx-a11y/aria-activedescendant-has-tabindex": 1,
+    "jsx-a11y/aria-props": 1,
+    "jsx-a11y/aria-proptypes": 1,
+    "jsx-a11y/aria-role": 1,
+    "jsx-a11y/aria-unsupported-elements": 1,
+    "jsx-a11y/heading-has-content": 1,
+    "jsx-a11y/href-no-hash": 1,
+    "jsx-a11y/html-has-lang": 1,
+    "jsx-a11y/iframe-has-title": 1,
+    "jsx-a11y/img-has-alt": 1,
+    "jsx-a11y/img-redundant-alt": 1,
+    "jsx-a11y/label-has-for": 1,
+    "jsx-a11y/mouse-events-have-key-events": 1,
+    "jsx-a11y/no-access-key": 1,
+    "jsx-a11y/no-distracting-elements": 1,
+    "jsx-a11y/no-onchange": 1,
+    "jsx-a11y/no-redundant-roles": 1,
+    "jsx-a11y/onclick-has-focus": 1,
+    "jsx-a11y/onclick-has-role": 1,
+    "jsx-a11y/role-has-required-aria-props": 1,
+    "jsx-a11y/role-supports-aria-props": 1,
+    "jsx-a11y/scope": 1,
+    "jsx-a11y/tabindex-no-positive": 1
+  }
+}