VK (VKontakte) support

[e965]

Hashtags:
#example → https://vk.com/feed?section=search&q=%23example (global search)
#example@apiclub → https://vk.com/apiclub/example (search in a specific community or in a specific user profile with screen name (not ID))
#блаблабла@apiclub → https://vk.com/wall-1?q=%23блаблабла (search for а non latin hashtag in a specific community (only with community ID, but ID with - sign))
#блаблабла@apiclub → https://vk.com/wall1?q=%23блаблабла (search for а non latin hashtag in a specific user profile (only with profile ID))

Mentions:
[id1|Pavel Durov], *id1 (Pavel Durov), @id1 (Pavel Durov) → Pavel Durov
[durov|Durov Pavel], *durov (Durov Pavel), @durov (Durov Pavel) → Durov Pavel
Same scheme ([club...|...], [public...|...], [event...|...]) is used for communities. Also, only [id1|Pavel Durov], [id1|Pavel Durov] and [club1|ВКонтакте API] templates are used in VK API (and it is necessary to implement them).