Replacing 'Pure' page title on home page with element style logo. Also c...

...hange favicon.
The homepage logo is non-transparent, white background, 8bit png at 2x resolution to support retina.
Note: I still can't preview the new favicon at localhost:5000 nor http://localhost:5000/favicon.ico
Can you add `alt={{title}}` to the `<img>` tag for accessibility?