closes #64 adding dataset logo

[sadchla-codes]

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[kaz462]

@sadchla-codes Since the dataset documentation was generated by create_adams_data.R, could you help populate labels in "Datasets" sheet from the spec? I can add xportr::xportr_df_label to create_adams_data.R after the spec updates. Thank you!

[sadchla-codes]

@sadchla-codes Since the dataset documentation was generated by create_adams_data.R, could you help populate labels in "Datasets" sheet from the spec? I can add xportr::xportr_df_label to create_adams_data.R after the spec updates. Thank you!

Sure, I'll work on that