Update npm deps
Удаляем ненужный кусок текста с неработающими ссылками
Методы update, replace, append, prepend, before, after возвращают проинициализированный контекст.
Replacing depricated $.event.handle to $.event.dispatch for poosibility to use jquery version > 1.8.3
Use the same object for this.mods and this.ctx.mods within default mode
api: refactor replaceContext into ContextReplacer
bemhtml: wrap escaping this

Put back $$block and friends into escaping `this`.

fix #555
api: wrap escaping apply() calls
Merge pull request #564 from bem/portCommits@2.x

Port commits from dev branch