Update VCell to handle many-SubTasks in SedML's RepeatedTask
SedML describes a way to apply a "generic parameter scan" (RepeatedTask) to any other task, but also to potentially multiple tasks.
VCell doesn't natively support this feature, but it can simulate this effect in CLI, and can import a model which will perform the same structure (it just won't have the same exact organization).
Steps to complete: 1a) For import, break apart each sub task into a new RepeatedTask with a single subtask, then convert into VCell Parameter Scan. 1b) For export, combine parameter scans across simulations/applications that have the same values and variables for the scan when writing the SedML. 2) For CLI, update the data-structures holding formatted data to hold the references to the seperately simulated data sets.