Merge pull request #30 from varya/master

[FAQ] Typos are fixed
feat(seo): add twitter card
feat(SEO): add open graph metatags

Closes #22
try #1
fix(SEO): fix opengraph images
Merge pull request #31 from varya/master

FAQ answers
Typo
chore(gulpfile): rewrite to match API 1.0
fix(gulpfile): migrating to gulp-bem@1.0.1
fix(faq): shorten question titles
fix(deps): remove boilerplate code
fix(index): fix title at the index
fix(faq): typo in quotes
fix(faq): remove quotes in questions list
fix(gulpfile): simplify html task
fix(package): add gulp-rename
fix(sass): pin gulp-sass to 1.1.0

Until https://github.com/sass/node-sass/issues/497 is resolved
fix url
Merge pull request #32 from ilyar/patch-1

fix url
We're using BEM too. JetBrains.