Added documentation to a majority of the files and implemented a better status reporting for image uploads. The return fvalue for updateProduct.php and deleteProduct.php will now reflect the results of the queries rather than if the php file had received the data from the corresponding js page.
Merging with remote development branch
Merged with remote development changes that implemented highlighting of unanswered and/or incorrectly answered questions. Documentation was added to multiple files for easier maintenance later. Image-upload status reporting reflects database results, not the results of ajax call to php file.