language: node_js
node_js:
    - '7'
cache:
  directories:
    - node_modules
install:
  - npm install
script:
  - npm run build:all

language: node_js
node_js:
    - '7'
cache:
  directories:
    - node_modules
    - build/png-cache
install:
  - npm install
script:
  - npm run build:all

Add PNG cache to Travis build cache
Add PNG cache to Travis build cache

* Closes #38.
