lint: add editorconfig and eslint to enforce

.editorconfig

@@ -0,0 +1,11 @@
+# http://editorconfig.org
+root = true
+
+[*]
+charset = utf-8
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[{*.js,*.json,*.yml}]
+indent_size = 2
+indent_style = space

.eslintignore

@@ -0,0 +1,2 @@
+coverage
+node_modules

.eslintrc

@@ -0,0 +1,7 @@
+{
+  "rules": {
+    "eol-last": "error",
+    "indent": ["error", 2, { "SwitchCase": 1 }],
+    "no-trailing-spaces": "error"
+  }
+}

.travis.yml

@@ -20,12 +20,14 @@ before_install:
   - "npm config set shrinkwrap false"
   # Setup Node.js version-specific dependencies
   - "test $TRAVIS_NODE_VERSION != '0.8' || npm rm --save-dev istanbul"
+  - "test $(echo $TRAVIS_NODE_VERSION | cut -d. -f1) -ge 4 || npm rm --save-dev eslint eslint-plugin-markdown"
   # Update Node.js modules
   - "test ! -d node_modules || npm prune"
   - "test ! -d node_modules || npm rebuild"
 script:
   # Run test script, depending on istanbul install
   - "test ! -z $(npm -ps ls istanbul) || npm test"
   - "test   -z $(npm -ps ls istanbul) || npm run-script test-travis"
+  - "test   -z $(npm -ps ls eslint) || npm run-script lint"
 after_script:
   - "test -e ./coverage/lcov.info && npm install coveralls@2 && cat ./coverage/lcov.info | coveralls"

package.json

@@ -19,6 +19,8 @@
   },
   "devDependencies": {
     "after": "0.8.2",
+    "eslint": "3.19.0",
+    "eslint-plugin-markdown": "1.0.0-beta.6",
     "finalhandler": "1.0.6",
     "istanbul": "0.4.5",
     "mocha": "2.5.3",
@@ -35,6 +37,7 @@
     "node": ">= 0.8"
   },
   "scripts": {
+    "lint": "eslint --plugin markdown --ext js,md .",
     "test": "mocha --reporter spec --bail --check-leaks test/",
     "test-cov": "istanbul cover node_modules/mocha/bin/_mocha -- --reporter dot --check-leaks test/",
     "test-travis": "istanbul cover node_modules/mocha/bin/_mocha --report lcovonly -- --reporter spec --check-leaks test/"