switch away from svn, fix #283.

--HG--
branch : trunk
diff --git a/setup.cfg b/setup.cfg
index 19dd821..2d74c58 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [egg_info]
 tag_build = dev
-tag_svn_revision = true
+tag_date = true
 
 [aliases]
 release = egg_info -RDb ''