add travis thing

.travis.yml

@@ -0,0 +1,23 @@
+# Sample .travis.yml for R projects.
+#
+# See README.md for instructions, or for more configuration options,
+# see the wiki:
+#   https://github.com/craigcitro/r-travis/wiki
+
+language: c
+
+before_install:
+  - curl -OL http://raw.github.com/craigcitro/r-travis/master/scripts/travis-tool.sh
+  - chmod 755 ./travis-tool.sh
+  - ./travis-tool.sh bootstrap
+install:
+  - ./travis-tool.sh install_deps
+script: ./travis-tool.sh run_tests
+
+after_failure:
+  - ./travis-tool.sh dump_logs
+
+notifications:
+  email:
+    on_success: change
+    on_failure: change