Set layout in rss.xml to 'null' instead of 'nil'
Remove 'popular' category from this post
Add mercenary gem to Gemfile and list gem on Travis CI
Revert "Add mercenary gem to Gemfile and list gem on Travis CI"

This reverts commit df8b4c354213ac6828e09dd9a3190495e2b12a94.
Lock jekyll gem to 2.4.0
Update to the latest sitemap_generator.rb
Allow Google Analytics to track activities from browsers
which have 'bot' inside their user agents
Merge branch 'update-site' into develop
Finish updating and bump substate