Changed a .gitignore file

Author: Taritsyn

.gitignore

@@ -1,12 +1,17 @@
 # Build Folders (you can keep bin if you'd like, to store dlls and pdbs)
 [Bb]in/
 [Oo]bj/
-[Ll]ib/
 
 # Node.js tools
 bower_components/
 node_modules/
 
+# Client side components
+**/JavaScriptEngineSwitcher.Sample.AspNet4.Mvc4/lib/
+**/scripts/build/
+**/styles/build/
+**/wwwroot/lib/
+
 ## Ignore Visual Studio temporary files, build results, and
 ## files generated by popular Visual Studio add-ons.