Switch range operators ".." and "...".

- 1..3 now means 1,2
- 1...3 now means 1,2,3

Implements <rdar://problem/16839891>

Swift SVN r18066

stdlib/core/NSSwiftArray.swift

@@ -57,7 +57,7 @@ class NSSwiftArray : HeapBufferStorageBase, CocoaArray {
         count: range.length)
     }
     
-    for i in range.location...range.location + range.length {
+    for i in range.location..range.location + range.length {
       dst++.initialize(reinterpretCast(buffer[i]))
     }
   }