* Downgraded ecma version of client-side scripts to v5. This change means no more backtick strings and some others.
* Massively modified auth.js, dashboard.js and home.js to support the downgrade (dashboard.js had the most changes).
* Removed enter key event handler from auth page. The previous code had some small issues. I'd rather not have the handler than let the issues persist. I'll eventually look into adding this again in the future.
* Updated uploadController.js to handle some invalid requests into /api/delete and /api/bulkdelete.
This commit is intended to downgrade codes in JS files used for browser to increase browsers compatibility.
This branch is still experimental and may require much more testing.
