A standoff in Hadley between the past and the future.  The town's Select Board is appealing a Hadley Historical Commission vote against erecting a cell phone tower next to the public safety complex that's 20 feet higher than the one there now.  Town officials say the extra 20 feet is needed to close gaps in communications for emergency personnel.  But the Historical Commission believes the added height would have an adverse visual impact on the nearby Hadley Historical District.  The matter is now in the hands of the Massachusetts Historical Commission.