Don't specify extensions in source_files
Don't specify extensions in source_files

Updated per review
https://github.com/bunchjesse/pod-template/commit/4ecd24de1de2d32ef503d419cd452dba91bfb9db
https://github.com/CocoaPods/CocoaPods/issues/3087#issuecomment-72394849
kostiakoval/pod-template,NFLibs/NFLoadingController,fulldecent/pod-template,orta/pod-template,fulldecent/pod-template,Backelite/pod-template,white-rabbit-apps/PinterestSwift,Orion777/pod-template,ryutamaki/pod-template,Backelite/pod-template,alexdoloz/Gridy,alexdoloz/Gridy,hwaxxer/pod-template,shenhzou654321/pod-template,kostiakoval/pod-template,ryutamaki/pod-template,Orion777/pod-template,NFLibs/NFLoadingController,mdsb100/ytx-pod-template,NFLibs/NFLoadingController,hwaxxer/pod-template,orta/pod-template,epologee/pod-template,Schemetrical/NSUserDefaults-Subscripting,Schemetrical/NSUserDefaults-Subscripting,shenhzou654321/pod-template,Ashton-W/pod-template-framework,white-rabbit-apps/PinterestSwift,alexdoloz/Gridy,mdsb100/ytx-pod-template,Schemetrical/NSUserDefaults-Subscripting,Ashton-W/pod-template-framework,epologee/pod-template,mdsb100/ytx-pod-template