ChecklistActivity.AddItemOnClickListener.onClick(): Check if the desired view is found, and if not, exit gracefully instead of crashing
ChecklistActivity: Add javadoc for refreshChecklistDataAndView()
Add javadoc for class ChecklistActivity
Remove the 'New item' menu option, along with all code that uses ItemDescriptionEntryActivity to add a new item
ItemDescriptionEntryActivity: Initialize field itemId at time of declaration
Change manifest to declare that the minimum supported SDK version is now Android 1.6 (API Level 4)