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Change logo filename so it doesn't fall prey to regex-based ad blocking.
Add copyright information.
Move some links into navbar below header.
Add 'IPython' h1 header, and change its layout.
Update logo to non-bevelled version
Separate out version info and links in sidebar.
Tweak theme so it fits better in a narrow window.
Reorganise sidebar links.
Tweaks to theme so we can customise sidebar easily.
Tweaks to theme, so it fits within browser width.