Adding workspaces for individual projects

Example/AFNetworking Mac Example.xcodeproj/project.xcworkspace/contents.xcworkspacedata

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+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:AFNetworking Mac Example.xcodeproj">
+   </FileRef>
+</Workspace>

Example/AFNetworking iOS Example.xcodeproj/project.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:AFNetworking iOS Example.xcodeproj">
+   </FileRef>
+</Workspace>