Changes in version 0.99.0                        

  - Initial Bioconductor package implementation.
  - Added controlled drug-gene relationship construction from PharmGKB,
    DGIdb, DrugCentral, and canonical user tables.
  - Added automatic public retrieval of the current ClinPGx/PharmGKB
    summaryAnnotations.zip archive.
  - Added gene-feature mapping for gene bodies, transcript promoters,
    coding exons, UTRs, and introns.
  - Added coordinate-preserving region annotation and grouped summaries.
  - Exact-variant annotations require explicit variant coordinates; gene
    and promoter overlap never imply a functional pharmacogenomic
    allele.