This revision includes the following changes:
 - [1] the social-icons.png sprite was deleted since it has not been in used for many revisions.
 - [2] browse/index.php was updated to take a more streamlined approach to browsing course sections and available books. It now features a listing of courses (rather than the Arbor JS graph) for an easier way of browsing course sections on tablet and mobile devices. The sidebar was also removed on the book browsing page to allow more room for long lists of books. The title of the course or course section was moved to a gray bar near the top of the page to display the page title and course icon on mobile devices. It is intended to take place of the sidebar, which is never present on a mobile device.
 - [3] arbor.full.js was updated to include more generous padding around the edge of the canvas so nodes are less likely to be partially cut off by the edge of the canvas.
 - [4] arbor.js reflects the change made to arbor.full.js.
 - [5] course.css includes several significant styles additions, most notably for the new listing of course sections for mobile devices, and the gray title bar near the top of the page for display on mobile devices.
 - [6] sell.css includes changes to the position of a background sprite for the delete and add row buttons on the sell-books/index.php page. These were updated since one of the components of the sprite was removed due to lack of use.
 - [7] sell.superpackage.min.css reflects the changes made to sell.css.
 - [8] actions.png no longer includes the dollar sign component of the sprite, due to lack of use.
 - [9] book.png no longer includes book, graduation hat, or speech bubble components, leaving just the star rating behind. The removed components have been inside the book-details.png sprite for quite some time.
 - [10] browse.png now only includes the back arrow and dollar sign components, since the other components were never used.
 - [11] course.min.css was added as the minified version of course.css.