Update podspec
Update podspec

* Support platforms iOS 7.0 and OS X 10.9.

* Merge subspecs back into pod_target_xcconfig (fix #78). Subspecs don't play well with frameworks, and this new setting is the proper way to keep the pod xcconfig from infecting the whole project.

pixelglow/ZipZap,ClioMobile/ZipZap,Doxxer/ZipZap,boherna/zipzap,pixelglow/zipzap,mpapp/ZipZap,rileytestut/ZipZap,treejames/ZipZap