Detailed installation instructions for Ubuntu

[bbresearcher]

I installed siderophile to test some rust code, but I ran into a few errors that I needed to find a workaround for.
I decided to document the process for both the crates.io and the github build process.
For each method's installation a fresh Ubuntu VM was set up.
Please feel free to decline to PR should it not be something you feel is needed.

[CLAassistant]

All committers have signed the CLA.

[woodruffw]

Could you put this under a new docs/ subdirectory? I think that'll help keep the project's root a little simpler.

[bbresearcher]

I have moved the file to the new directory, and also updated the readme with the new path, I also used to opportunity to fix typos I found.
Thank you for considering the contribution.

[woodruffw]

Nitpick: maybe move this below the other installation instructions, since it's more specific than everything else?

[bbresearcher]

Thank you I have moved the position to the bottom of the section

[woodruffw]

Thanks @bbresearcher! I've left a few style nitpicks, but this LGTM overall in terms of content. Some thoughts:

1. I'm so-so on including high-level steps like "install cURL" and "install Rust" -- IMO these could just be links or omitted entirely, since a user who wants to scan a Rust crate with siderophile probably already has Rust installed or knows enough about Rust to install it.
2. I'm okay with this being a separate documentation file, but IMO it could also just go on the wiki instead.

[bbresearcher]

Thank you I have made the suggested changes.
I am more than happy for the instructions to be moved to a wiki (apologies I tried to follow the link in your comment, but I can't find the wiki folder).
I am also more than happy if you prefer to not include these instructions in the github repository.