A common set of date/time functions for CLJC. These functions give client-server agreement on dealing with common
date/time processing that happens with respect to UI controls. There is a general formatting function that uses
Java DateTimeFormatter on the JVM for server-side, but in order to keep the UI code a light as possible that formatter
is hand-written using the built-in browser Intl function (which has the locale data for many locales and does not
bloat your js file).

As such the `formatter` from this namespace is not completely isomophic in CLJ vs CLJS, since in CLJ that formatter
can be used for general parsing, but in CLJS it cannot. This should not generally be a problem because the parsing
you usually need in the UI is for date controls, and there are functions for ISO parsing that work just fine without
needing locale data.

Support for CLJC arbitrary precision decimal numerics. CLJ support for BigDecimal works well, but it is not
directly supported in CLJS.  Use the support in this ns when you need to write CLJC code that works the same
in both.

You MUST include big.js as a js dependency for this to compile in CLJS.

An implementation of date formatting that uses ISO format specifiers, but uses browser built-in Intl support
to get the locale-dependent values

Loads a 10-year range of time zone definitions