Industry experts predict nearly 400 original shows will be produced and marketed in the U.S. in 2015 – a huge difference from the days when it was easy to keep track of the shows on just a few networks. That means keeping track of what you’ve watched and want to watch can be a big job. We have four app suggestions to make your TV watching less of a pain. TeeVee 3 is an app that bills itself as “your TV shows guru.” The app not only lets you know show schedules, but also is able to fill you in on the casts from a database of more than 30,000…