Reader: full post URLs should be hackable

[bluefuton]

URLs should be "Predictable, guessable, hackable." (Tom Coates, Native to a Web of Data: http://www.darkcoding.net/future-of-web-apps/tom-coates-native-to-a-web-of-data/)

The current full post URL looks like:

/read/post/feed/34575/937262759

It feels like you should be able to lop off the post ID, and see the feed stream, but you cannot. '/post` feels misplaced.

Full post URLs should look more like this:

/read/feed/34575/posts/937262759

...with a redirect added from the old URL, too.