Added iamdustan/smoothscroll polyfill in dashboard pages.
This will polyfill smooth scroll (when executed programmatically)
for older browers.
No-JS uploader's notice button when on private mode will now also say
"Log in to upload", although auth page will still require JS.
All front-end buttons will now use outlined version. I'm lovin' it.
Auth page will now show a loading spinner if the user has a saved token.
Afterwards, they will still be redirected to dashboard.
Better error handlers in home, dashboard, and auth pages.
Removed <hr> from uploads & users lists in dashboard.
"Manage your token" menu will no longer try to make an API request prior
to displaying its page.
Reloading the page will already trigger token verification anyway.
Updated public/images/fb_share.png.
Updated README.md.
A few other tweaks.
* Updated screenshot in README.md, as well as replaced fb_share.png with the same image.
* Removed 512px.png and replaced it with 512pxr.png (a round version) in manifest.json.
* globals.v is now split into globals.v1 and globals.v2. The former for CSS and JS files, the latter for images and config files (manifest.json, etcetera).
* All static images that are part of the layout will now have their URLs appended with globals.v2 (which means this does not include dynamically generated images such as thumbnails of uploaded files).
* Added fb_share.png.
* Updated README.md to use fb_share.png (using a copy hosted at safe.fiery.me though).
* Updated all html files to add fb_share.png as an extra og:image tag.
