created JS-Code-Linting-In-Javascript

closes freeCodeCamp#608

JS-Code-Linting-In-Javascript.md

@@ -0,0 +1,9 @@
+Linting is the process of running a program that analyzes your code for programmatic and stylistc errors. A linting tool or a linter marks or flags any potential errors in your code such as syntax errors or incorrectly spelled variable names. This can save time and help you write better code. 
+
+Linters can be installed using npm or another package manager. They are used from the command line by passing in files, are available as plugins for tools, or are integrated into editors. 
+
+Here are some popular Javascript Linters: 
+* [JSLint](http://www.javascriptlint.com/online_lint.php)
+* [JSHint](http://jshint.com/)
+* [JSCS](http://jscs.info/)
+* [ESLint](http://eslint.org/)