Updated s.source_files to reflect the new pod file location

Author: kvdesa

SnappingLayout.podspec

@@ -26,5 +26,5 @@ DESC
   s.ios.deployment_target = '9.0'
   s.swift_version = '4.2'
 
-  s.source_files = 'SnappingLayout/Classes/**/*'
+  s.source_files = 'Sources/SnappingLayout/Classes/**/*'
 end