List the available RAVmodels
availableRAVmodel(simplify = TRUE)Default is TRUE. If it is set to FALSE, the
additional metadata of different versions of RAVmodel
Under the default, this function will return a data frame with four columns - prior, version, update, pkg_version.
prior : Different gene sets used for RAVmodel annotation.
    Currently, two are available - C2 for MSigDB C2 (curated gene 
    sets), and PLIERpriors for bloodCellMarkersIRISDMAP, svmMarkers, 
    and canonicalPathways
version : RAVmodel's version, which can be an input for 
    version argument of getModel function
update : Date the RAVmodel is updated
pkg_version : Compatible version of GenomicSuperSignature
availableRAVmodel()
#>         prior version   update pkg_version
#> 1          C2    beta 20201101       1.1.0
#> 3          C2  latest 20220115       1.3.0
#> 4 PLIERpriors    beta 20201101       1.1.0
#> 6 PLIERpriors  latest 20220115       1.3.0