build: Correct app version and enable automated upload to Google Play

Change-Id: I253bb795b65dfc4cff52c244c824d42f7fc71c17
diff --git a/app/src/main/play/contactEmail b/app/src/main/play/contactEmail
new file mode 100644
index 0000000..e406e99
--- /dev/null
+++ b/app/src/main/play/contactEmail
@@ -0,0 +1 @@
+info@named-data.net
\ No newline at end of file