Docs clarifications

[nrichards]

( Should 'squash' this when merging )

• Remove some colloquialisms
• Revise order of sentences
• Transform parenthetical comments into em dash sentence endings
• Use table for some tabular information
• Use canonical words for certain buttons and names

ALSO Incorporated suggestions from @silverbucket - thank you!

SEE HERE (in PR description) a formatted diff of changes as of 06896be: README-diff.html.txt

• Download this .html.txt, rename to .html, and view on desktop
• Generated with https://github.com/jduckles/pwdiff <3

[nrichards]

Thank you @silverbucket - added your suggestions to my branch, which can be merged if the PR is accepted.

[raspy135]

It looks awesome I'll merge it