Implement Disqus on all topic pages

Closes #6
Confirm Item Deletion

This commit adds a directive that prompts a user for confirmation
first.  Once they have confirmed, it will call the confirming action.

This also prevents the problem with early redirection.

Closes #117
Merge pull request #136 from keelerm84/feature/implement-disqus-on-topic-pages

Implement Disqus on all topic pages
Merge pull request #137 from keelerm84/feature/item-deletion-confirmation

Confirm Item Deletion