Issue with 11..19 and n1 numbers and polish locale

[jcubic]

I've created Polish locale (will create PR) but have problems. In polish
"1 month" ago is "1 miesiąc temu"
"%s months ago" is "%s miesięce temu"
but for numbers 11..19, 21 31, ..., 91 is "%s miesięcy temu"

and there is no way to have this locale without modification of the library. Maybe locale be a function that accept number and unit like:

function locale(number, unit) {
   var str = number.toString();
   if (unit == 'hours') {
       if (number == 1) {
          return ['1 godzinę temu', 'za 1 godzinę'];
       } else if (str.length == 2 && str[0] == "1" || number % 10 == 1) {
          return ['%s godzin temu', 'za %s godzin'];
      } else {
        return ['%s godziny temu', 'za %s godziny'];
      }
  }
}

and the code can detect if locale is function or array.

[hustcc]

@@, ^==^
so function locale should be allowed, or the only way of locale is function？

[jcubic]

I think it should be allowed, so the old locale will work without the need to covert them to functions.

[hustcc]

OK, It can only be this way. Polish is a very specia language ^_^~

You can just do it, but keep the library little, and the tests/locales_test.js must be updated also.

[hustcc]

In fact, the locales were added in 2 days (today and yesterday)， so I think the locales rule can be updated. The rules now is not very prefact, it can be:

1. all locales can be independent module;
2. timeago.register('locale_name', locale_func), the locale_func can be require from 1 ;
3. the build in locales(en, zh_CN) can modified to function.

If change the locales rule to above, the library maybe more tiny and prefact.

[hustcc]

just have a look 5c834b3. @NicoJuicy @paulcmal @CreativeSparkStudios @jcubic

update the locales, use locale function. and all locale.js should be a javascript module.

// register
timeago.register('da', require('timeago.js/locales/da'));

// then use it
timeago.format(date, 'da');

the locales rule more prefact, and the library from 2.5kb to 2.1 kb. ^_^~