Adding/Fixing Plural and Ordinals

Run WritePluralRulesSpreadsheets.java

Q: Is the output supposed to be captured somewhere? Prints stuff to console.

Adding rules for a locale

Changing rules/ranges

Whenever you change plural rules, ordinal rules, or plural ranges — and at the end of the release — you must do the following.  The reformatting is required, since it regenerates the samples (after @), which are now necessary for correct functioning of ICU and other clients.