Merge branch 'issue/41' into 'master'

config/ci_test.yaml.example

src/adapter/postgres.spec.ts

src/adapter/postgres.ts

src/core/engine.spec.ts

src/core/engine.ts

src/core/view.ts

src/util/configParser.ts

test/postgres/fixtures/view0.json

test/postgres/fixtures/view2.json

test/postgres/fixtures/view8.json

test/scenario.ts