Avatar Tweaks

[bengott]

Use larger avatar images for Twitter and Facebook (~200x200 instead of ~50x50)

• Fixes blurry avatar on user profile page
• File sizes only slightly larger (a few kB), so just use them everywhere
• Also renamed @shaialon's recently added "gravatar" template/view to "avatar" (because it's for all avatars, not just gravatar)

[shaialon]

Well done @bengott, thanks for the catch

[SachaG]

Nice to see this avatar stuff coming together :)

[bengott]

[bengott]

I also thought about moving the logic from the getAvatarUrl() function directly into the {{> avatar}} template, but I'm assuming getAvatarUrl() and all those other functions in /lib/users.js are there for a reason (namespacing? accessibility from both client & server?). I found only two other references to getAvatarUrl(). One is in /client/views/comments/comment_item.js and is commented out, and the other is in /client/views/posts/modules/post_content.js, but it doesn't look like it's being used (deprecated?). Anyway, I suppose this logic will eventually get exported when we break out all this avatar stuff into its own package, eh?

[SachaG]

You're right, but that's a good point. Even if we're not using it on the server right now, we do want to make that possible. For example, we might want to include avatars in an email template.