Add log grouping to buildkite

It mostly truncates the log anyway but what are you gonna do

.buildkite/pipeline.yaml

@@ -10,13 +10,16 @@ steps:
   - label: ":karma: Tests"
     command:
       # Install chrome
+      - "echo '--- Installing Chrome'"
       - "wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add -"
       - "sh -c 'echo \"deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main\" >> /etc/apt/sources.list.d/google.list'"
       - "apt-get update"
       - "apt-get install -y google-chrome-stable"
       # Run tests
+      - "echo '--- Fetching Dependencies'"
       - "./scripts/fetch-develop.deps.sh --depth 1"
       - "yarn install"
+      - "echo '+++ Running Tests'"
       - "yarn test"
     env:
       CHROME_BIN: "/usr/bin/google-chrome-stable"