adding travis.ci and coffeelint for static analysis

.travis.yml

+dist: trusty
+
+language: node_js
+node_js:
+  - "node"
+  - "8"
+
+before_install:
+  - npm i -g npm@5.6.0
+
+install:
+  - npm install -g coffeelint
+
+script:
+  - coffeelint scripts