Restyle and update entire Guacamole website.

[mike-jumper]

This change massively restyles the entire website, attempting to refresh the overall look. The home page has been restyled with curves that are reminiscent of the classic bowl logo:

The release archives has been restyled to resemble a timeline:

Other changes include:

• Switching over to "Inter", "Rubik", and "Inconsolata" as the fonts used throughout the site.
• Migrating to SVG images wherever possible.
• Migrating to SCSS for maintainability of styles.
• Creating new images for the feature list on the home page.
• Adding content to clarify how mailing lists are used, directly point to the code of conduct (and highlight that our mailing lists are not to be used to promote commercial products).
• Providing instructions for support companies interested in being listed.
• Cleaning up the structure of the navigation menu, adding duplicate entries as necessary to make it easier to find the mailing lists, bug tracker, etc.

[jmuehlner]

I still need to to go through this with a finer-toothed comb, but it's looking really good so far!

[jmuehlner]

Looks good to me! It'd probably be good to get another set of eyes on a change this big, though.

@necouchman what do you think?

[necouchman]

Looks good to me! It'd probably be good to get another set of eyes on a change this big, though.

@necouchman what do you think?

Sure, I'll take a look through it.

[necouchman]

Just one item that I'm wondering if it should be updated - other than that I'm good with the changes.