fix yammer icons
Merge branch 'master' of https://github.com/davliu/sticky into gh-pages

* 'master' of https://github.com/davliu/sticky:
  fix yammer icons
  Update seeds.
Merge branch 'gh-pages' of https://github.com/davliu/sticky into gh-pages

* 'gh-pages' of https://github.com/davliu/sticky: