All rvt data types available in Raven are supported (e.g. :MultiData, :Data, :ObservedData,
:BasinInflowHydrograph). This is handled by the mappings provided in the data("rvn_rvt_mappings_data")
function, and additional support for other rvt types can likely be included by making updates
to that function with modifications to the somewhat generic read function here.
It does NOT support the master .rvt file with :Gauge or :GriddedForcing commands, only the
reading of time-series based .rvt files with a single time series block within the file.
The timezone is provided by the tzone argument as "UTC" by default, and should be adjusted by
the user to the local time zone as needed, based on the model run.