simulate_data: Simulate read data
In CshlSiepelLab/nascentRNASim:

Take a GRanges-class of transcript annotations and a transcript_archetypes object and simulate read counts.

simulate_data(
  ta,
  annotations,
  library_depth = 3e+07,
  jitter = 0,
  show_progress = F
)

`ta`	a transcript_archetypes-class object
`annotations`	a `GRanges` object with a `score` column indicating abundances
`library_depth`	library depth to simulate (approximate)
`jitter`	amount by which reads can be shifted to the left or right (default: 0)
`show_progress`	show progress bar