Updates playgrounds

Author: cbaker6

ParseSwift.playground/Pages/10 - Cloud Code.xcplaygroundpage/Contents.swift

@@ -34,5 +34,6 @@ cloud.runFunction { result in
 }
 
 //: Jobs can be run the same way by using the method `startJob()`
+PlaygroundPage.current.finishExecution()
 
 //: [Next](@next)

ParseSwift.playground/Pages/7 - GeoPoint.xcplaygroundpage/Contents.swift

@@ -177,4 +177,5 @@ print(explain)
 let hint = try query2.find(explain: false, hint: "objectId")
 print(hint)
 
+PlaygroundPage.current.finishExecution()
 //: [Next](@next)

ParseSwift.playground/Pages/8 - Pointers.xcplaygroundpage/Contents.swift

@@ -84,4 +84,5 @@ author2.save { result in
     }
 }
 
+PlaygroundPage.current.finishExecution()
 //: [Next](@next)

ParseSwift.playground/Pages/9 - Files.xcplaygroundpage/Contents.swift

@@ -151,4 +151,6 @@ do {
 /*: Files can also be saved from files located on your device by using:
  let localFile = ParseFile(name: "hello.txt", localURL: URL)
 */
+
+PlaygroundPage.current.finishExecution()
 //: [Next](@next)

ParseSwift.playground/contents.xcplayground

@@ -10,6 +10,5 @@
         <page name='7 - GeoPoint'/>
         <page name='8 - Pointers'/>
         <page name='9 - Files'/>
-        <page name='10 - Cloud Code'/>
     </pages>
-</playground>
+</playground>