Convert text files to Markdown files

[willtheorangeguy]

From Auto-Anouncements created by willtheorangeguy: willtheorangeguy/Auto-Anouncements#12

From PyWorkout created by willtheorangeguy: willtheorangeguy/PyWorkout#13

Convert all boring .txt files to easy-to-read .md files.

Also ensure that all files have a file extension, and are formatted to that extension.