Allows you to create in-page abbreviation tags by simply
writing something in all-uppercase and placing the definition
into round braces behind it, like: WIKI (a WikiWikiWeb).
prev << "markup/timestamp"
next >> "markup/definitionlinks"

You cannot modify the README.plugins file, but anyhow any ideas or suggestion should as usually get filed on BugReports, UserSuggestions or even better the README.plugins.Discussion.