add style check with jscs

Author: siuying

.jscsrc

@@ -0,0 +1,18 @@
+{
+    "esnext": true,
+    "fileExtensions": [ ".js" ],
+
+    "validateLineBreaks": "LF",
+    "validateIndentation": 4,
+
+    "disallowKeywords": ["with"],
+    "disallowSpacesInsideObjectBrackets": null,
+    "disallowImplicitTypeConversion": ["string"],
+
+    "excludeFiles": [
+        "bin/**",
+        "build/**",
+        "node_modules/**",
+        "test/**"
+    ]
+}

lib/parser.js

@@ -9,7 +9,7 @@ class Parser extends EventEmitter {
             parser.parseLine(line);
         });
         tail.on('error', function(data) {
-          console.error("error:", data);
+            console.error("error:", data);
         });
     }
 

package.json

@@ -4,6 +4,7 @@
   "description": "Utilities for Hearthstone the online card game.",
   "main": "hearthstone.js",
   "scripts": {
+    "lint": "jscs .",
     "build": "traceur --dir lib build ",
     "test": "mocha --compilers js:mocha-traceur --reporter spec test/*.js"
   },
@@ -22,6 +23,7 @@
   "devDependencies": {
     "chai": "1.10.0",
     "chai-spies": "^0.5.1",
+    "jscs": "^1.11.3",
     "mocha": "^2.0.1",
     "mocha-traceur": "2.1.0"
   }