Try to merge code from github.com/blond/enb-bem-core-i18n

[tormozz48]

There is new i18n code working with bem-core core. Some of techs can be merged from it into current package

• [x] Support i18n for bem-core — #32, #33, #42
• [x] Support bh — #31, #46
• [x] Support bem-xjst — #34
• [x] Support xjst — #47

[arikon]

@blond @tormozz48 Зачем?

[tadatuta]

@arikon если сойдется, то вместо двух пакетов про сборку локализации будет один с единым API

[blond]

@arikon отписал тут https://nda.ya.ru/3Qiss2

[arikon]

@tadatuta @blond :+1: