Added Topic expiration methods

  - expired?
  - unexpire!
  - topic_expiration (private)
Merge branch 'master' of github.com:eWrestlingNews/newspresso_forum

* 'master' of github.com:eWrestlingNews/newspresso_forum:
  Add views to forum index
  Update user profile links
  Update forum to include edit links
  Updating forum layout