Fix typos and capitalization of words

[mtsknn]

No description provided.

[casey]

Thank you for this PR! I think that I like having binary names be lowercase and in backticks, as opposed to using the capitalized name. Would you mind changing instances of just, make, bash, and cargo to use backticks?

[mtsknn]

Yep, "just" is a common word so I originally capitalized it everywhere to make it clearer that we are talking about just.

I now changed all instances to "just", except in headings it's still "Just". Similarly for make, bash and cargo. (Though line 1545 still has "Bash" instead of "bash" because I think in that case the capitalized name is clearer and consistent with the other names on that line. Similarly for "Cargo" on line 109.)

[casey]

Awesome, looks great. This is a big improvement to the consistency of the readme. Thank you very much!