(#2379) - Fixing a typo
(#2372) - update adapters.md for safari/ios

Let's spread the good word - Safari and iOS
will have IndexedDB. :)
(#2387) - document CORS error
(#2375) - Simplify the less of the logo
(#2376) - clean up external.md
PSA - this branch is useless; delete it whenever you like

This is a cherry-pickin' branch for gh-pages.

You can feel free to throw it away whenever you like.
I'm just trying to get changes to the site as fast as possible
without documenting the breaking stuff from 3.0.0.