Integrated responsive styling and fixed up an ajax issue with the form submit.

git-svn-id: https://plugins.svn.wordpress.org/mn-contact-form/trunk@933316 b8457f37-d9ea-0310-8a92-e5e31aec5664
added required images

git-svn-id: https://plugins.svn.wordpress.org/mn-contact-form/trunk@933318 b8457f37-d9ea-0310-8a92-e5e31aec5664