Cleanup for 0.3.1

[George3d6]

There's a bunch of stuff that needs some cleaning up before 0.3.1

• [x] Cleanup code in the endpoints
• [x] Cleanup code in the new plugin
• [x] The addition of the "standard" config system to the receptor's and agent's main.rs
• [x] Cleaning up useless (or rarely used dependencies)
• [x] Upgrading dependency versions to the latest usable ones
• [x] Standardizing naming across config files and coming up with better defaults for them
• [x] Cleaning up code in general (this is an ongoing issue, but the codebase has grown quite a lot and I want to try and shrink it a bit before the release)
• [ ] Documenting the code via comments inside the code (There's some annoying logic going on in there which I'd rather document).

[Deedasmi]

FYI, https://github.com/killercup/cargo-edit is a godsend for managing dependencies. Just run cargo upgrade and it'll upgrade all your dependencies, then you just have to make sure it still compiles ;)

[George3d6]

All done except for comments.

I'll move that part to 0.3.2 or 0.4