Support floating numbers for plurals translation

[alextrs]

I'm trying to make floating numbers to work with plurals translation. Was looking for a while and then realized that library doesn't support it at this point. I pulled "make-plural" library and if I pass 0.5 it returns "other" which makes sense, but i18nTranslatePlural MakePlural returns "many". After digging a bit more, I found that it happens because of parseInt statement on line 358 in i18n.js (so 0.5 becomes 0 -> "many").

If it makes sense to change from parseInt to parseFloat I will be happy to make this change.

I have in JSON:
"%s tablespoon": {
"one": "столовая ложка",
"few": "столовых ложки",
"many": "столовых ложек",
"other": "столовой ложки"
}