Add a :ReadingTime command

[jisantuc]

I've used

wordcount=$(wc -w $inf | awk '{{ print $1 }}')
readtime_minutes=$(echo "${wordcount}/265 + 1" | bc)
echo "Estimated reading time minutes: ${readtime_minutes}"

as a script before, but with %, I bet it wouldn't be too hard to get a popup of reading time in the current buffer, or maybe even get it into statusline somehow if I'm feeling really fancy (or maybe there's an off-the-shelf plugin I could use instead)