Added CursorUtils.getRequiredBoolean(Cursor,int).  Boolean is the only
type with a getRequired...(Cursor,int) method since there is no
Cursor.getBoolean(int) method.  Instead, a user would call
Cursor.getInt(int) and compare the return value to 1, which is what
CursorUtils.getRequiredBoolean(Cursor,int) does.