feat(issues): add getNote(), updateNote()

Author: fengmk2

.travis.yml

@@ -1,5 +1,5 @@
 language: node_js
 node_js:
-  - '0.11'
+  - 'iojs-2'
 script: "npm run test-travis"
 after_script: "npm install coveralls@2 && cat ./coverage/lcov.info | coveralls"