Merge branch 'master' of https://github.com/babka2teror/vk-x.github.io

# By Nikita Litvin (2) and babka2teror (1)
* 'master' of https://github.com/babka2teror/vk-x.github.io:
  add description
  feat(install): browser detect + dropdown
  refactor(install): less <b>
feat(features): add "features" page (ru)

Add `ru/features.html` page with the features list taken from
http://vkopt.net/forum/showthread.php?t=139&page=100