Add creep roles to wiki.

[ahmedcharles]

I'm not sure if there's a way for me to propose an edit to the wiki, so here it is in markdown.

| Prefix | Role              |
| ------ | ----------------- |
| B      | builder           |
| BM     | builder.mines     |
| BR     | builder.remote    |
| C      | claimer           |
| D      | dismantler        |
| F      | brawler           |
| FE     | guardian          |
| G      | gatherer          |
| H      | harvester         |
| HD     | harvester.deposit |
| HP     | harvester.power   |
| HR     | harvester.remote  |
| M      | mule              |
| S      | scout             |
| T      | transporter       |
| TP     | hauler.power      |
| TR     | hauler            |
| TRR    | hauler.relay      |
| U      | upgrader          |

[Mirroar]

Not a bad idea. I don't know how it looks for non-maintainers, but I have a section at the bottom right of https://github.com/Mirroar/hivemind/wiki that allows me to clone the wiki repository, which you should then be able to submit pull requests to.

[ahmedcharles]

I can clone the wiki locally, but I'm not sure how to fork it in order to submit a PR.

[Mirroar]

From what I've read, there's no way to create a PR like you can for code changes. But you can send me a patch file, or link me a diff on your own repo, and then I can consider merging that into the wiki.