-Added new setting 'show_exchange_url' which hides/shows the exchange link
-Updated all exchanges with a trade url template which can be used to automatically determine the correct url for each trading pair
-Added a new client-side library for date/time formatting: Luxon v1.26.0
-Added new date/time settings for display format, timezone (utc or local) and an option to enable alternate timezone tooltips
-All date/time values are now formatted via Luxon and displayed according to the new configurable settings
-All markets now return Trade History timestamp values as unix timestamp values formatted in seconds
-Replace tabs with double-spaces
-Betting spacing and lining up of code functions
-Add missing semi-colons
-Remove extra characters and spaces where applicable
-Remove commented-out code fragments
-Add missing 2021 date to LICENSE
-Small touchups and other misc nitpickings
Joe Uhren