UI Conroller Cleanup

In an effort to get the data collector to work in iOS 5.1, I've been cleaning up the UI Controllers a bit. Despite what the commit message says, it doesn't completely work on 5.1. All of the views I touched work, but I haven't done anything to the observation form yet (it crashes in iOS 5.1). I also modified the layouts so that at least all of the buttons are visible on the iPhone.