Stick with the following style:
* Header 1 with the module name is in `lowercase`.
* Other headers are in `Sentence case`. Common header names that should
be consistently used are `Aliases`, `Contributing`, `Functions`,
`Settings`, and `Zsh options`.
* The names `Zim` and `Zsh` always appear capitalized, even in the
middle of sentences.
* Prefer
print 'code indented with 4 spaces'
instead of
```zsh
print 'code fenced by lines with three back-ticks'
print 'unless you want syntax highlighting'
```
Same for the `lx` alias.
Also update the README.md. Replace table by bulleted list so it's
possible to use `|` in the text without breaking the Markdown rendering
(as it did for the table).
Set `less` termcap colour variables, and update the module README.md.
Change the code to enclose all colour logic within a
`(( ${terminfo[colors]} >= 8 ))` condition.
Check if `PAGER` is set before setting the `lm` alias.
Keeping the British "colour" spelling. :-)
Closes#101
