feat(stark-build): implement integration with Angular CLI via @angula…

…r-builders

ISSUES CLOSED: #883, #146, #114

BREAKING CHANGE: stark-build now integrates with Angular CLI:

   - **stark-build:** now provides partial Webpack configurations to override default configuration from Angular CLI. The application's `angular.json` file must be adapted to use this partial configs from stark-build via [@angular-builders](https://github.com/meltedspark/angular-builders). See [Stark-Build: Ng CLI Customizations](./docs/stark-build/NG_CLI_BUILD_CUSTOMIZATIONS.md)
   - **stark-core:** the application's `angular.json` file must be adapted to add the assets from stark-core to be copied to the application's `assets` folder. See [Stark-Core: Getting Started](./docs/stark-core/GETTING_STARTED.md#assets)
   - **stark-ui:** the application's `angular.json` file must be adapted to add the assets from stark-ui to be copied to the application's `assets` folder. See [Stark-UI: Getting Started](./docs/stark-ui/GETTING_STARTED.md#assets)

.travis.yml

@@ -29,7 +29,7 @@ install:
   - if [[ ${TRAVIS_BRANCH} =~ ^greenkeeper.*$ || ${AUTHOR_NAME} == "greenkeeper[bot]" ]]; then npm run clean:modules:all; fi
   - if [[ ${TRAVIS_BRANCH} =~ ^greenkeeper.*$ || ${AUTHOR_NAME} == "greenkeeper[bot]" ]]; then npm i; else npm ci; fi
   - if [[ ${TRAVIS_BRANCH} =~ ^greenkeeper.*$ || ${AUTHOR_NAME} == "greenkeeper[bot]" ]]; then npm run install:travis:all; else npm run install:ci:all; fi
-  - if [[ ${TRAVIS_TAG} == "" && ${TRAVIS_EVENT_TYPE} != "cron" ]]; then npm run build:showcase:ghpages:ci-test-env; else npm run build:showcase:ghpages; fi
+  - npm run build:showcase:ghpages
 
 env:
   global: