Updated Dickey Ridge Trail alignment from Snead Farm to Lands Gap; other nearby updates
trail alignment tweaks according to Strava heatmap
added cemetery according to park map
Updated items/alignments around Snead Farm
Updated area around Indian Run in SNP
Updated midsection alignment of Dickey Ridge Trail; other nearby updates
Extended Meadow Brook; other nearby updates
Updated some items around Happy Creek Park
Updated surfaces; fixed issues/warnings around Nats Park
Updated northern end of Dickey Ridge Trail
Updated Cedar Creek alignment; other nearby updates
Updated items near I-81 @ Cedar Creek
Made railway disused; couple alignment tweaks
Updated items in Othello Park, mostly trails