This revision includes the following changes:
 - [1] brighton-pier.jpg, fibonacci-sequence.jpg, romeo-and-juliet.jpg, sheet-music.jpg, and tuscarora-mountain-tunnel.jpg have been deleted in favor of a different set of background images more suitable for the smaller size of the banner on the browse/index.php page.
 - [2] arbor.full.js was updated to better respond and resize it self to different sized screens. The canvas padding has been reduced so that courses with many course number are not packed so tightly on mobile devices. Also, course section nodes which are invisible can no longer be clicked on, but must be revealed first before it can be clicked.
 - [3] admin/api.php was updated to include a nice set of directions for each of the third-party services the administrator must configure on this page. It also includes more API information for the Cloudinary service, which will be necessary for uploading images.
 - [4] admin/settings.php has been updated to include a update success message, an improved set of instructions for some of the more complex or obsecure settings, and a (not yet operational) button to reload the IndexDen index.
 - [5] browse/index.php no longer includes the algorithm for generating the Arbor JS initialization script, as this has been moved to the Books class. It also includes links to a newer set of images which are better suited for the smaller banner size, and can also properly count the number of books available within a course.
 - [6] bookshelf.jpg, brooklyn-bridge.jpg, and php.jpg have been updated to better fit the new banner size on the browse/index.php page.
 - [7] arbor.js includes the changes mentioned for the arbor.full.js script.
 - [8] sell-books/index.php now implements an easter egg in the banner of the page for Matthew Geary.
 - [9] explore.css now switches to mobile mode for a slightly higher resolution, because the tiles on the plugin home page were breaking onto the next line as the screen size approched (but didn't yet switch) to mobile mode.
 - [10] arbor.min.css includes the changes mentioned for the explore.css stylesheet.
 - [11] sell.css now adds a line above the directions section (just above the step 1 section) on the sell-books/index.php page.
 - [12] sell.superpackage.min.css includes the changes mentioned for the sell.css stylesheet.
 - [13] credits.txt accredits the new images which have been added in this revision, as well as the bookshelf.jpg image which was negleceted in prior releases.
 - [14] the IndexDen class now features the ability to reload an index in batches of 200 items (as to not cause a server timeout during the steep processing time), fetch the size of the index, and purge the index of expired books.
 - [15] the Admin class no longer uses the "ffi_be_new_" namespace prefix on the table names in the included SQL queries.
 - [16] the Book class has been updated to fetch the total number of available books within a particular course, an algorithm to generate the Arbor JS initialization code, and no longer uses the deprecated Google Shopping API to suggest book covers, but rather it uses the InvisibleHand API.
 - [17] the Settings class includes small changes such as no long using the "ffi_be_new_" namespace prefix on table names, throwing the No_Data_Returned exception when no settings information is available in the database, and turning off auto complete in the form input fields some of its methods construct.
 - [18] the admin/cron.php page was added to purge IndexDen of all expired books on a regular basis.
 - [19] the admin/processing/settings.php page was added to process the plugin settings form in the administration section of the plugin.
 - [20] the admin/reset.php page was added to be called whenever the IndexDen index needs to be reloaded. This page is intended to be called over and over again until the all of the batches of books have been uploaded to the index in pieces.
 - [21] the electronic-board.jpg, higgs-boson.jpg, parthenon.jpg, phanton-of-the-opera.jpg, piano.jpg, and beans.jpg photos have been added as new images to use in the banners of the browse/index.php and sell-books/index.php pages.
 - [22] the Settings_Process class has been added as the processor used for updating the plugin's settings.