* 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.