Search service implementation

added support for Object.entries, removed a console.log and fixed an issue where the page wouldn't reset after selecting a new filter

Added docs about Angulartics providers

Merge remote-tracking branch 'lotte/search-backend' into w2p-50632_Replace-mock-registry-service-with-implementation

Added support for Google Analytics

Merge remote-tracking branch 'lotte/search-backend' into w2p-50632_Replace-mock-registry-service-with-implementation

Conflicts:
	src/app/core/core.module.ts