add travis-ci badge ("build passing") to README file

diff --git a/README.md b/README.md
index 73c62a20a384a1be5307fe4d4b760d91f9483bc0..83b4d379ac6ea1360b201de413b9a4995a83a2bc 100644 (file)
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
+[![Build Status](https://travis-ci.org/openstreetmap/Nominatim.svg?branch=master)](https://travis-ci.org/openstreetmap/Nominatim)
+
 Nominatim
 =========