Rename Simpler.Data to Easier

I'm pretty convinced that Simpler.Data needs to be renamed. One, there is a pretty popular library called Simple.Data which could be confusing. Second, I think it needs to have its own identity since it isn't directly tied to Simpler anymore (although I would expect them to continue to be used together going forward).

I've been asking around for name suggestions but I haven't had much luck. If #7 is merged then maybe Easier is an appropriate name since that PR is designed to make it as easy as possible to learn and use. Another reason I like the name Easier is that just because it's easy to use doesn't mean it should be used in every situation. I'm thinking the README could contain a section discusses choosing an ORM and that while this library might be the *easiest* to use, it isn't necessarily always the *best* choice. Therefore the objective of the library is made pretty clear by the name Easier.

I also can't help but smile when I think about us talking about using Simpler and Easier. It's cheesy, but it sends a powerful message at the same time.