Change to using a neutral locale for currency, date and time formatting.

Change to using a neutral locale for currency, date and time formatting.

This solves the problem of currency values being represented without a
space between the currency code and the number (e.g. "EUR5.89" is now
represented as "EUR 5.89"). More work is required when we implement
a locale preference setting.

* TODO: Add note about currency formatting issues with different
locales.
* src/main/java/org/glom/web/server/OnlineGlomServiceImpl.java: Change
to using the neutral ROOT locale.