message: build: compile protos before run compile; fixes synthtool failure
diff: "fix": "gts fix",
  "prelint": "cd samples; npm link ../; npm install",
  "lint": "gts check",
  - "prepare": "npm run compile",
  + "prepare": "npm run compile-protos && npm run compile",
  "samples-test": "cd samples/ && npm link ../ && npm test && cd ../",
  "presystem-test": "npm run compile",
  "system-test": "mocha build/system-test --timeout 600000",
  