Investigate switch from CocoaPods to Carthage.

[webframp]

Determine if switching to Carthage and removing the dependency on CocoaPods to allow using xcconfig files is worth the effort (probably, yes).

• https://github.com/Carthage/Carthage

This should also enable removing the multiple plist config with various build settings (adhoc,debug,release).

Using the latest BuildSettingExtractor release could help with migration:

• https://github.com/dempseyatgithub/BuildSettingExtractor/releases/tag/v1.3.2

[jdek]

I started working on this, I have a WIP in my fork. Though I will only be able to finish it in January when I get my mac back from repair.

[webframp]

Thanks @jdek feel free to open a draft PR anytime you want input!