Make ItemsDbHelper.DATABASE_VERSION final
res/layout/item_row.xml: Use non-display dependent units to specify list TextView's height and text size
Moved ChecklistActivity to new package com.android.checklist.activity
Fix imports in ChecklistActivity.java and ItemDescriptionEntryActivity.java after moving ChecklistActivity
Move ItemDescriptionEntryActivity to com.android.checklist.activity
Move ItemsDbHelper to package com.android.checklist.dbhelper
ItemsDbHelper: Move DATABASE_NAME and DATABASE_VERSION to the inner class DbHelper since they are only used there