Add styleint (linter for scss files) with initial config.

.stylelintrc.json

@@ -0,0 +1,59 @@
+{
+  "rules": {
+    "color-hex-case": "lower",
+    "color-no-invalid-hex": true,
+
+    "function-calc-no-unspaced-operator": true,
+    "function-comma-space-after": "always-single-line",
+    "function-comma-space-before": "never",
+    "function-name-case": "lower",
+    "function-url-quotes": "always",
+    "function-whitespace-after": "always",
+
+    "number-leading-zero": "always",
+    "number-no-trailing-zeros": true,
+    "number-zero-length-no-unit": true,
+
+    "string-no-newline": true,
+    "string-quotes": "single",
+
+    "unit-case": "lower",
+    "unit-no-unknown": true,
+    "unit-whitelist": ["px", "%", "deg", "ms", "em"],
+
+    "value-list-comma-space-after": "always-single-line",
+    "value-list-comma-space-before": "never",
+
+    "shorthand-property-no-redundant-values": true,
+
+    "property-case": "lower",
+
+    "declaration-block-no-duplicate-properties": true,
+    "declaration-block-no-ignored-properties": true,
+    "declaration-block-trailing-semicolon": "always",
+    "declaration-block-single-line-max-declarations": 1,
+    "declaration-block-semicolon-space-before": "never",
+    "declaration-block-semicolon-space-after": "always-single-line",
+    "declaration-block-semicolon-newline-before": "never-multi-line",
+    "declaration-block-semicolon-newline-after": "always-multi-line",
+
+    "block-closing-brace-newline-after": "always",
+    "block-closing-brace-newline-before": "always-multi-line",
+    "block-no-empty": true,
+    "block-opening-brace-newline-after": "always-multi-line",
+    "block-opening-brace-space-before": "always-multi-line",
+
+    "selector-attribute-brackets-space-inside": "never",
+    "selector-attribute-operator-space-after": "never",
+    "selector-attribute-operator-space-before": "never",
+    "selector-combinator-space-after": "always",
+    "selector-combinator-space-before": "always",
+    "selector-pseudo-class-case": "lower",
+    "selector-pseudo-class-parentheses-space-inside": "never",
+    "selector-pseudo-element-case": "lower",
+    "selector-pseudo-element-colon-notation": "double",
+    "selector-pseudo-element-no-unknown": true,
+    "selector-type-case": "lower",
+    "selector-no-id": true
+  }
+}

package.json

@@ -15,6 +15,7 @@
     "gulp-sourcemaps": "^1.6.0",
     "raw-loader": "^0.5.1",
     "sass-loader": "^3.2.0",
+    "stylint": "^1.3.10",
     "ts-loader": "^0.8.2",
     "tslint": "^3.8.1",
     "typings": "^1.0.4",
@@ -47,7 +48,8 @@
   },
   "scripts": {
     "postinstall": "typings install",
-    "lint": "tslint 'src/**/*.ts' 'config-serializer/**/*.ts'",
+    "tslint": "tslint 'src/**/*.ts' 'config-serializer/**/*.ts'",
+    "stylelint": "stylelint 'src/**/*.scss' 'sass/**/*.scss' --syntax scss",
     "typings": "typings",
     "build": "gulp",
     "build:test": "webpack --config 'config-serializer/webpack.config.js'",