Issue #48: Add route to return list of metrics and dimensions

config/ci_test.yaml.example

src/api/controllers/data.spec.ts

src/api/controllers/engine.spec.ts

src/api/controllers/engine.ts

src/api/router-v1.ts

src/core/dimension.ts

src/core/engine.spec.ts

src/core/engine.ts

src/core/metric.ts

src/util/configParser.spec.ts

src/util/configParser.ts

test/scenario.ts