[python-matplotlib] Also actually add setup.cfg

[Thomas Spura]

commit b69e56e8d0641c0eca920635816a0dd01639640e
Author: Thomas Spura <thomas.spura at gmail.com>
Date:   Sat Jan 25 17:22:54 2014 +0100

    Also actually add setup.cfg

 setup.cfg |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/setup.cfg b/setup.cfg
new file mode 100644
index 0000000..c8f8c20
--- /dev/null
+++ b/setup.cfg
@@ -0,0 +1,2 @@
+[rc_options]
+backend = GTKAgg