Make Metric/Imperial System configurable

[WhyNotHugo]

As it is right now, betty uses the imperial system by default (for things like, say, the weather).

This makes these answers understandable for only three countries in the world, while people from the other 193 will just stare confused, being unable to interpret these results. Since betty can't convert between units either (#89), this make these results even more useless.

Betty should have an option to use the SI, or, at the very least, use it by default.

[pannous]

add &locale=... parameter to web query

[pannous]

or ask explicitly: how is the london weather in celsius

[WhyNotHugo]

add &locale=... parameter to web query

Where exactly do I add this param? /etc/betty/bettyconfig ?

Also, having something like betty use locale ___ would be useful, in any case.

[pannous]

sounds good. and then use it like this:

  path = "/api?"
  path += "input=#{ encoded }"
  path += "&locale=" + BettyConfig.get("locale") || ENV["LANG"]

(in main.rb .. def web_query )

[pannous]

or via require 'locale' Locale.current

[Tamsyn]

Yes please.