Set new Melange version number to 2-1-20150317.

Change-Id: Ib0c1916e5203b9ce4b7af4f10e2abf000ff27790
diff --git a/app/app.yaml.template b/app/app.yaml.template
index 0ae3952..5d7e334 100644
--- a/app/app.yaml.template
+++ b/app/app.yaml.template
@@ -15,7 +15,7 @@
 # TODO(proto): uncomment and supply a Google App Engine application instance
 # application: FIXME
 # TODO(release): see the instructions in README about the "version:" field
-version: 2-1-20150316
+version: 2-1-20150317
 runtime: python27
 api_version: 1
 threadsafe: false