function getOptions( attribute, propertyIndex ) {
		if ( attribute in options ) {
			properties[ propertyIndex ] = options[ attribute ];
		}
	}
formatProperties( pattern, cldr [, options] )

@pattern [String] raw pattern for numbers.

@cldr [Cldr instance].

@options [Object]:
- minimumIntegerDigits [Number]
- minimumFractionDigits, maximumFractionDigits [Number]
- minimumSignificantDigits, maximumSignificantDigits [Number]
- round [String] "ceil", "floor", "round" (default), or "truncate".
- useGrouping [Boolean] default true.

Return the processed properties that will be used in number/format.
ref: http://www.unicode.org/reports/tr35/tr35-numbers.html