Revert "Revert all the things."

This reverts commit 5c410f011a981f7d3f14b1d94d488a9f500da935.
Fix this query

ActiveRecord will take an array of ids for the .find class method
Show tags for all posts on the root page

webkit browsers (chrome, safari) and FF are nice enough to parse the markup so
the initial element with the given ID as the only one, but what this should
actually do is setup the tags for each post on the page.