indent/lbs, consistent non-use of HTML namespace, consistent indents, consistent charset
    casing
- Linting (Markdown): Add `.remarkrc`, use proper hierarchical headings, use consistent
    heading format, trailing spaces
- `composer.json`: consistent property spacing
- License: Add `.txt` extension, update copyright date, and reflect type (MIT) in file name
- Credits: Add self
- npm: Add `package.json` (version 3.0.0-alpha.1 for npm release only; just reserving name)