Adding definitions_id option instead of station_id in definitions

[lilyclements]

• add_definitions_to_bucket - now updated. You can add the definitions to the bucket based on the ID
• definitions - now updated. You can call the definitions based on the ID
• annual_rainfall_summaries now updated
• add_summaries_to_bucket and add_data_to_bucket still should remain that you call the station_id, not the definition (or we can do both station_id, ., definition_id for add_summaries_to_bucket (and when calling the summaries from the bucket)
• Updated for r-instat functions
• Update for all summaries - annual_temperature_rainfall, etc.
• Check tests/fix any issues in tests

TODO

• All data sets must be named in the metadata

fixes #121