Revert "Replace copied table view cells with a single nib"

Although redundant, having to change the same view four separate times
on four separate view controllers is better than abandoning storyboard
segues.

This reverts commit 50fe3c3dc5ed123005e0807a260fa33212edec9e.

Conflicts:
	The Oakland Post.xcodeproj/project.pbxproj
	The Oakland Post/Base.lproj/Main.storyboard
	The Oakland Post/PostCell.xib
Make Star button easier to tap again
Perform segue when tapping a starred post

Also fixed a couple minor inconsistencies.
Keep starred posts sorted by author date