Wrap scripts in an anonymous function to pass jQuery in as $
Load custom script in the footer with wp_enqueue_scripts

Rather than calling the script directly in HTML, we can take
advantage of wp_enqueue_script to ensure it is loaded properly.

This also loads the script in the footer, as it only uses
document.ready functionality.
Merge pull request #2 from washingtonstateuniversity/scripts

[PR] Update handling of scripts in child theme