added eslint for codeclimate

Author: dimaspirit

.eslintignore

@@ -1 +1,2 @@
 **/*{.,-}min.js
+src/plugins/jquery.ajax.js

.eslintrc.yml

@@ -0,0 +1,18 @@
+env:
+  browser: true
+  commonjs: true
+  node: true
+extends: 'eslint:recommended'
+rules:
+  indent:
+    - error
+    - 4
+  linebreak-style:
+    - error
+    - windows
+  quotes:
+    - error
+    - single
+  semi:
+    - error
+    - always