Even more robust HealthKit connection.

Polished for new iOS and watchOS, improved trends graph display, more robust HealthKit connection, increased general app efficiency.

Squished a bug that sometimes excluded yesterday's data from Trends view, and a bug that sometimes prevented Trends view from updating when changing it's date range. Performance improvement: took some weight off Trends view refresh.

This app has been updated by Apple to display the Apple Watch app icon. - English localization - Export / share .csv file of recent records - Add weight measurement for an earlier date - Now supports pounds, kilograms and stones.