py-asdf: bump to recent commit
--- trunk/dports/python/py-asdf-devel/Portfile 2016-04-28 20:37:56 UTC (rev 148171)
+++ trunk/dports/python/py-asdf-devel/Portfile 2016-04-28 20:41:05 UTC (rev 148172)
@@ -5,7 +5,7 @@
PortGroup python 1.0
PortGroup github 1.0
-github.setup SeismicData pyasdf a586aab56c
+github.setup SeismicData pyasdf 682a820f90
name py-asdf-devel
conflicts py-asdf