message: Use all-caps env var name
  Makes HTTP_PROXY consistent with PORT or TRAVIS_BUILD_NUMBER
  elsewhere in the application. Are parsed case insensitive by Node anyway.
diff: @@ -4,10 +4,10 @@ var proxy = {
  proxyType: 'autodetect'
  }
  -if (process.env.http_proxy !== undefined && process.env.http_proxy !== null) {
  +if (process.env.HTTP_PROXY !== undefined && process.env.HTTP_PROXY !== null) {
  proxy = {
  proxyType: 'manual',
  - httpProxy: process.env.http_proxy
  + httpProxy: process.env.HTTP_PROXY
  }
  }
  