* Add sed scripts that find the versions of podspecs
... without fully loading those via Pod::Spec, which is slow.
* Avoid compiling with different visibility settings
... in different translation units. This removes warnings about linking
googletest causing weak symbols becoming strong.
* Add CMake objc_framework
* Define FirebaseCore via objc_framework
* Define FIRCoreDiagnosticsInterop via objc_framework
* Define GoogleUtilities with objc_framework
* Define FirebaseCoreDiagnosticsInterop via objc_framework
* Define FirebaseAuthInterop via objc_framework
* Don't duplicate Core's dependency information everywhere
* Remove podspec_framework
* Fix compilation error with -Wstrict-prototyes
Paul Beusterien