v0.2.54..v0.2.55 changeset README.txt

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+This tests to make sure that railway conflation doesn't leave any orphaned secondary features that belong to relations. See Linha do Oeste.
+Since railway conflation uses the Unifying road merging algorithm, the fix employed by this test should work for road data as well.
+
+Not sure yet if some of the bridges in the secondary data connected to the rails should be carried over to the output or not.