Display crates in non-alphabetical order

**Is your feature request related to a problem? Please describe.**
After looking on the website, it currently appears that crates in the various category registries are listed in alphabetical order. This makes it more difficult to find crates that are de-facto standards in the community, and may have larger communities or user/contributor bases.

**Describe the solution you'd like**
Display crates using an alternative metric, perhaps such as based on a weighted combination of total vs. recent downloads.

**Additional context**
This is how Are We Learning Yet currently lists its crates, and I think it has proved advantageous for new users interested in finding libraries to use.