add LESS lint

.lesshintrc

+{
+  "emptyRule": false,
+  "importantRule": false,
+  "propertyOrdering": false,
+  "singleLinePerSelector": "18f",
+  "hexLength": {
+    "style": "short"
+  },
+  "zeroUnit": {
+    "style": "no_unit"
+  },
+  "hexNotation": {
+    "style": "lowercase"
+  },
+  "stringQuotes": {
+    "style": "double"
+  },
+  "idSelector": {
+    "exclude": []
+  },
+  "qualifyingElement": {
+    "allowWithAttribute": true
+  },
+  "selectorNaming": {
+    "disallowUppercase": true,
+    "disallowUnderscore": true,
+    "disallowDash": true
+  },
+  "importPath": {
+    "filenameExtension": true,
+    "leadingUnderscore": false,
+    "exclude": []
+  }
+}

package.json

@@ -4,7 +4,9 @@
   "description": "",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
-    "start": "./node_modules/.bin/gulp"
+    "start": "./node_modules/.bin/gulp",
+    "less-lint": "lesshint ./src/less/ ./src/blocks/",
+    "precommit": "npm run less-lint"
   },
   "author": "Nikolay Gromov",
   "license": "MIT",
@@ -37,6 +39,7 @@
     "gulp-svgstore": "^5.0.5",
     "gulp-uglify": "^1.5.2",
     "imagemin-pngquant": "^4.2.0",
+    "lesshint": "^1.4.0",
     "mkdirp": "^0.5.1"
   },
   "config": {