feat(cors): setup cors

A lot of stuff here. A lot of little fixes in auth.js, and removing the
proxy from the grunt build process.
feat(footer): add logos to footer

Added logos to the page footer, and changed the background colour to be
white.
feat(core): add archive.skeletome.org to cors
fix(auth): fix api logout url

Logout url was pointing to the wrong endpoint
fix(core): remove localhost from core list
fix(nom): update a bunch of packages