Use new logo on website.

[mikeal]

Loving this new logo :)

[stevemao]

Related issues: #458 #501 #367
@mikeal Should we update https://github.com/nodejs/nodejs.org/blob/master/static/documents/foundation-visual-guidelines.pdf?

[rvagg]

FYI

[fhemberger]

@mikeal Please use ImageAlpha and ImageOptim to shrink the file size before adding images. You always tend to add unnecessarily large files to the site.

Updated the image, went from 63KB down to 24KB: 6b49e53.

[mikeal]

ya, i always get ahead of myself and checkin giant images. sorry :/

[silverwind]

Not sure who updated the org logo on Github, but it has some artifacts which are especially noticeable on dark backgrounds:

Also, the hexagon is very slightly cut off at the top.

[stevemao]

It looks correct with the default theme. @silverwind are you using https://github.com/StylishThemes/GitHub-Dark? I can see there is a white area on the image though.

[silverwind]

Yeah using that style, but the white part is visible on the left too: https://avatars1.githubusercontent.com/u/9950313. I'll see to making fixed version based on the logo in this PR.

[silverwind]

Here's a version that's cleanly trimmed and square. Someone please update the org logo!

By the way, The gradients on the original source are not really smooth. Maybe a compression artifact or is it intended?

[mikeal]

I just cleaned this up, should look better now.

[silverwind]

Looking great, thanks 👍