Branding updates for crates.io

[behnam]

Since crates.io is getting some new design soon, and we're moving cargo docs to doc.rust-lang.org, I think it's a good time to update some branding matters of crates.io as well. Two things come to my mind right now:

• On the header of https://crates.io/, it says "CARGO: packages for Rust". I think it can be more like "Crates.io: Rust Package Registry".

• On the main page, it says "The Rust community’s crate host". I think we better change the wording to "registry" instead of "host".

[seanprashad]

Hi there! I'm a student at Seneca College whose enrolled in an Open Source course taught by my professor and Mozillian, David Humphrey. I would love to tackle this bug for my course if it's still available and unassigned.

[behnam]

Thanks for offering to help, @seanprashad! Let's see if we have more to do here, and if so, would be great if you can submit a PR.

IMHO, I feel like we're done here already. I mean, "The Rust community's crate host" title is in align with the "Rust Package Registry" that's in the header, and I think we better not to repeat the word "registry" too much.

What do you think, @carols10cents? Do we want more updates here, or should we just close the task?

[carols10cents]

@behnam Oh, I thought the idea was to switch to "registry" everywhere? I think to be consistent we should change "The Rust community’s crate host" to "The Rust community’s crate registry" :) It'd be awesome if you could take care of that @seanprashad!

[seanprashad]

@carols10cents @behnam I would be ecstatic to tackle it in the next few days when I get a break from classwork! I will notify you two once completed!

[seanprashad]

@carols10cents @behnam I just submitted PR #1098 which includes this small modification! Please let me know if there is anything else that I can help with!!