Changes from FRED 1.0 to FRED 2.0

We have continued to solicit feedback from the broader community of FRED users; the updates that we implemented between FRED 1.0 and FRED 2.0 can be found below. Because FRED 2.0 improves upon FRED 1.0, and also corrects some minor mistakes, we recommend that users download FRED 2.0. However, FRED 1.0 is also still available.