Add language back, looks like csharp is required for the build.

glennc · glennc · commit cc2f91045fb8 · 2015-04-03T12:36:07.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,3 +1,4 @@
+language: csharp
 sudo: false
 script:
   - ./build.sh verify
