tweak pager and title in basic => template skin

Summary: its a bit confusing but "newer" posts are the "previous" page and "older" posts are the "next" page. this is because newer posts are those with higher ids. also make the title be the title of the post if we have an actual post.

Test Plan: set page limit to 5 and got somewhat sensical results (note this pagination seems to break with my test data set where there's fun gaps in the contiguity of the ids in a given blog) viewed an actual post and noted the page title was the post title

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D4222