Take advantage of inflection inside ICU

[richgillam]

Many ICU APIs produce structured output (sentences or phrases) rather than single phrases. Many of these not only may need to inflect in interesting ways to support being inserted into a message, but have individual components that affect each others' inflections. Examples include:

• Formatted dates
• Date ranges
• Spelled-out numbers
• Dimensioned numbers
• Lists
• Person names
• Locale names

It'd be nice if we could use the new inflection capability to improve and simplify the formatting algorithms for these things.