v0.7.8 - How much deception can you take?

The primary focus of this release is the aggregator and feed item scanner. This isn't a "sexy" release at all. It's all, boring, under the hood stuff that just needed doing for a long time. The feed scanner is now asynchronous like the feed puller is. This will make things go much faster. There were also a lot of edge cases I've been noting in cart'ing articles that are now fixed.