Add linting for code blocks in markdown files

.eslintignore

@@ -0,0 +1,2 @@
+_book/
+build/

.eslintrc-markdown

@@ -0,0 +1,21 @@
+{
+  "extends": "./.eslintrc",
+  "root": true,
+  "plugins": [
+    "markdown"
+  ],
+  "rules": {
+    "class-methods-use-this": 0,
+    "import/no-unresolved": 0,
+    "import/no-extraneous-dependencies": 0,
+    "import/extensions": 0,
+    "max-len": 0,
+    "no-unused-vars": 0,
+    "no-console": 0,
+    "no-undef": 0,
+    "react/react-in-jsx-scope": 0,
+    "react/jsx-filename-extension": 0,
+    "react/jsx-no-undef": 0,
+    "react/no-multi-comp": 0,
+  },
+}

package.json

@@ -28,6 +28,7 @@
     "react:15.4": "npm run react:clean && npm install && npm i --no-save react@15.4 react-dom@15.4 react-addons-test-utils@15.4",
     "react:15": "npm run react:clean && npm install && npm i --no-save react@15 react-dom@15 create-react-class@15 react-test-renderer@^15.5.4",
     "docs:clean": "rimraf _book",
+    "docs:lint": "eslint --ext md --config .eslintrc-markdown .",
     "docs:prepare": "gitbook install",
     "docs:build": "npm run docs:prepare && gitbook build",
     "docs:watch": "npm run docs:prepare && gitbook serve",
@@ -86,6 +87,7 @@
     "eslint-config-airbnb": "^15.0.1",
     "eslint-plugin-import": "^2.3.0",
     "eslint-plugin-jsx-a11y": "^5.0.3",
+    "eslint-plugin-markdown": "^1.0.0-beta.6",
     "eslint-plugin-react": "^7.0.1",
     "gitbook-cli": "^1.0.1",
     "in-publish": "^2.0.0",