Changes in version 0.99.0                        

  - First Bioconductor submission.
  - Added ke_gene_sets(), which returns the genes of each Key Event as a
    GSEABase::GeneSetCollection.
  - Added aop_summary(), which returns the Key Events of an AOP in
    causal order, with the OECD status, taxonomic applicability and
    stressors.
  - Added stressor_aops(), which lists the AOPs a stressor is used in,
    together with the adverse outcomes they end in.
  - Added ke_components(), aop_components() and aop_plot_components()
    for Key Event Components and their ontology identifiers.
  - Every result now carries the version of the AOP-Wiki dataset it came
    from.
  - Relicensed under MIT.