Change blog url
Add responsive video plugins

https://github.com/optikfluffel/octopress-responsive-video-embed
Change blog url
Fix shadow box mixin arguments
Fix previous and next article links overlapping with article border
Merge branch 'develop'

* develop:
  Fix previous and next article links overlapping with article border
  Fix shadow box mixin arguments
  Change blog url
  Add responsive video plugins
  Change blog url