Merge branch 'feature/ru-localized-ui-text' into develop

Add Russian localized UI text to test and documentation site
- Close #815

Add Russian localized UI text

Merge branch 'feature/greedy-nav-long-title-fix' into develop

Add flexbox fixes for < IE9 to make the greedy nav button visible

Run through Autoprefixer

Update GreedyNav to use flexbox instead of `display: table`
- ref #836

Update GreedyNav.js

Replace with relative sizes

Update GreedyNav.js

Fix bug - include section for Discourse embedded comments (#825)

Merge branch 'release/4.2.1' into develop

Bump version to 4.2.1

Update CHANGELOG and history

Pagination now works for index.html files in subfolders. Links to next page consider baseurl now. (#764)

* Links to next page consider baseurl now.

* paginate_show_page_num controls whether page number gets output.

Add https prefix to google-universal embed code. (#772)

Merge branch 'release/4.2.0' into develop

Bump version to 4.2.0

Bump jekyll-sitemap to (1.0)

Update CHANGELOG and history