Landing pull request 611. Adds Contributing to jQuery Guidelines section to readme. Fixes #10611.

More Details:
 - https://github.com/jquery/jquery/pull/611
 - http://bugs.jquery.com/ticket/10611

README.md

 [jQuery](http://jquery.com/) - New Wave JavaScript
 ==================================================
 
+Contribution Guides
+--------------------------------------
+
+In the spirit of open source software development, jQuery always encourages community code contribution. To help you get started and before you jump into writing code, be sure to read these important contribution guidelines thoroughly:
+1. [Getting Involved](http://docs.jquery.com/Getting_Involved)
+2. [Core Style Guide](http://docs.jquery.com/JQuery_Core_Style_Guidelines)
+3. [Tips For Bug Patching](http://docs.jquery.com/Tips_for_jQuery_Bug_Patching)
+
+
+
 What you need to build your own jQuery
 --------------------------------------
 
@@ -99,7 +109,7 @@ The makefile has some targets to simplify submodule handling:
 
 #### `make update_submodules` ####
 
-checks out the commit pointed to by jquery, but merges your local changes, if any. This target is executed 
+checks out the commit pointed to by jquery, but merges your local changes, if any. This target is executed
 when you are doing a normal `make`.
 
 #### `make pull_submodules` ####