[Podspec] Rename Pod to NimbleMatcher

[kylef]

The name Nimble is already used by another Pod (since early 2013). I think it would be far clearer if this Pod used a different name (NimbleMatcher, or something more suited).

Having two Pods with the same name, means that this Pod cannot be submitted to the master spec repository and it might be confusing to users when there are two Pods with the same name. It will also prevent being able to use both of these Pods at the same time.

https://github.com/CocoaPods/Specs/blob/master/Specs/Nimble/0.0.1/Nimble.podspec.json

[modocache]

I think this is worth considering--thanks for the heads up, @kylef! 👍

Before merging this, I'd like to reach out to @MarcoSero for his thoughts on the matter. 📧 ✨

[modocache]

After speaking with @MarcoSero, we've decided to keep this project's CocoaPod name the same, but change his to Nimble-CoreData. He asked if I (or someone contributing to this project) could take care of the name change for him (I don't blame him--I'm actually not entirely sure how to do this either!).

I'll close this pull request, and in its place #79 will track changing that project's name to Nimble-CoreData.

[MarcoSero]

👍