setup .gitmodules to use a trackin branch automatically

Byron · Byron · commit 1fe2a9403faf · 2010-12-01T10:28:14.000+01:00
diff --git a/.gitmodules b/.gitmodules
@@ -1,3 +1,4 @@
 [submodule "async"]
 	path = gitdb/ext/async
 	url = git://github.com/gitpython-developers/async.git
+	branch = master
