Turn on ESLint in examples directory, apply examples-specific exceptions

.eslintignore

@@ -2,7 +2,6 @@ build/
 l10n/
 docs/
 node_modules/
-examples/
 external/bcmaps/
 external/webL10n/
 external/cmapscompress/

examples/.eslintrc

@@ -0,0 +1,24 @@
+{
+  "extends": [
+    "../.eslintrc"
+  ],
+
+  "parserOptions": {
+    "ecmaVersion": 5,
+  },
+
+  "env": {
+    "es6": false,
+  },
+
+  "globals": {
+    "pdfjsImageDecoders": false,
+    "pdfjsLib": false,
+    "pdfjsViewer": false,
+    "Uint8Array": false,
+  },
+
+  "rules": {
+    "object-shorthand": ["error", "never"]
+  }
+}

examples/node/.eslintrc

@@ -0,0 +1,9 @@
+{
+  "extends": [
+    "../.eslintrc"
+  ],
+
+  "env": {
+    "node": true,
+  },
+}