Add travis

.travis.yml

@@ -0,0 +1,17 @@
+notifications:
+  email: false
+language: node_js
+node_js:
+- node
+- 7
+- 6
+- 4
+- 0.12
+- 0.1
+deploy:
+  provider: npm
+  email: github@tixz.dk
+  api_key:
+    secure: 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
+  on:
+    tags: true

README.md

@@ -1,5 +1,7 @@
 # `blake2b`
 
+[![Build Status](https://travis-ci.org/emilbayes/blake2b.svg?branch=master)](https://travis-ci.org/emilbayes/blake2b)
+
 > Blake2b (64-bit version) in pure Javascript
 
 This module is based on @dcposch