PA: PA 171 Minor Realignment Between I-81 and PA 92

[Markkos1992]

Between 2013 and 2015, there was a slight realignment in this area.  I included a Historic Aerials link in my current commit on this.

Local Commit in PA Branch: https://github.com/Markkos1992/HighwayData/commit/8f53e94c5538f20710b56528af8b254e63372b89

[Markkos1992]

https://github.com/TravelMapping/HighwayData/pull/3720

[vdeane]

Now the great debate for those of us who have driven through that area but not on the realignment... ignore it (it's only 350 feet away at the furthest), leave it in our .list files but make a note to re-clinch, or remove it from our .list files.  I'm inclined to just ignore it right now, but this seems to have been significant enough to have had points added at either end, and I've been known to ignore things and then get more anal about them later.