Close #680 - Move Google Analytics to scripts.php
Update contributing guidelines
Update README
Updated polish translation
Remove WP Super Cache, add Soil to Recommended Plugins

Recommend only W3TC instead of both W3TC and Super Cache since it
could be confusing:

https://groups.google.com/forum/?fromgroups=#!topic/roots-theme/nOfLGhq90Ow
Merge pull request #681 from netboy/master

Update Polish translation
Use Bootstrap media object for listing comments

http://twitter.github.com/bootstrap/components.html#media

- Introduce lib/comments.php: contains Roots_Walker_Comment

- Update templates/comments.php to use the new walker, general
clean up
Merge pull request #683 from retlehs/bs_media_object_comments

Use Bootstrap media object for listing comments
Ref #652 - Add installation/config info to docs TOC
Remove disabled post nav links
Add section about grunt to README
Simplify alerts
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  Simplify alerts
  Add section about grunt to README
  Remove disabled post nav links
  Ref #652 - Add installation/config info to docs TOC
  Use Bootstrap media object for listing comments
  Remove WP Super Cache, add Soil to Recommended Plugins
  Updated polish translation
  Update README
  Update contributing guidelines
  Close #680 - Move Google Analytics to scripts.php