Add resources to pod spec file.

[SergioEstevao]

Closes #577

This issue resulted from the Removal of Gridicons done here: #559

The resources where not added to the pod, so this made application that used the pod crash when trying to access a resource.

To test:

• The easiest way to test this is to try this version directly on the main WPiOS app.

Note: @diegoreymendez because we are using CocoaPods should convert the Example app to use CocoaPods instead of Carthage? This will make it easier to find this kind of issue.

[diegoreymendez]

because we are using CocoaPods should convert the Example app to use CocoaPods instead of Carthage? This will make it easier to find this kind of issue.

WordPress is using the library through CocoaPods, but that doesn't mean this library is only intended for use through CocoaPods.

I haven't tested it yet, since WPiOS uses CocoaPods, but the idea is Aztec should be usable through Carthage as well.

[SergioEstevao]

@diegoreymendez maybe two example projects? one with pods another with Carthage?

I just suggest this because it will make it easier and earlier to detect this kind problem.

[diegoreymendez]

If we had problems with CocoaPods often I could agree, but these issues are very sporadic.

The downside of having two example projects and having to keep them in synch would affect us far more often.

[jleandroperez]