Changelog • indicators

Added a NEWS.md file to track changes to the package.
Added vignettes Naming Conventions and Data Acquisition from Eurostat.
Create the test_db.db from the README.md example.

na.approx works with unit tests, and has working examples, except for forecasting. Forecasting, and potentially all approximation should be based in the future on timetk.

indicator_forecast now works, but with dependency forecast.

tidy_indicator() and get_eurostat_indicator() is tested against a wide range of real-life data, and it is now passing a number of unit tests.

tidy_indicator and get_eurostat_indicator is tested against a wide range of real-life data, and it is now passing a number of unit tests.

create_observatory_palette() and add_country_groups() to create consistent visualizations in the long-form documentation. An example of creating a new indicator in data-raw.

is_unique_observations() is user-facing and test_unique_observations() only in approximation flows.
The indicator S3 class is added for manual indicator creation or imports from Zenodo with a vignette.