Bump samples/versions - reduce image sizes through multi-stage builds

Signed-off-by: Alex Ellis <alexellis2@gmail.com>

sample-functions/MarkdownRender/vendor/github.com/russross/blackfriday/.travis.yml

@@ -0,0 +1,18 @@
+# Travis CI (http://travis-ci.org/) is a continuous integration service for
+# open source projects. This file configures it to run unit tests for
+# blackfriday.
+
+language: go
+
+go:
+    - 1.5
+    - 1.6
+    - 1.7
+
+install:
+    - go get -d -t -v ./...
+    - go build -v ./...
+
+script:
+    - go test -v ./...
+    - go test -run=^$ -bench=BenchmarkReference -benchmem