Point at the latest stable tag for version 1.#.# AFNetworking.
ARCHS is no longer specified in the build settings.

This changes other small xcodeproj settings such as the order of the
AFNetworking folder in the file viewer sidebar.
Completely disable NSURLCache.

This is because we allways want fresh content from Github and we already
handle the case where the internet connection is off or shoddy.
Fixes #8: Stop using time to decide which notifications to ignore.
Merge pull request #28 from squaresurf/issue-8

Fixes #8: Stop using time to decide which notifications to ignore.