SimpleCursorList: Allow subList
SimpleCursorList.subList: Skip null item
SimpleCursorList: More log and Allow null item
Add SubCursorList
SimpleCursorList: Try to fix null exception
SimpleCursorList: Add private subArrayList()
SubCursorList: More comment
Implement clear() and addAll()
Fix boundary check
Fix subList from SubCursorList
Implement subList for cursor interface
Fix CursorListIterator
Implement add, remove, indexOf, lastIndexOf and contains