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
