Add setters for Sim
Simplify simDuration and simReps to duration and reps
Add hasNext, hasPrev methods for Nodes
Rename Decision to Decide so that it becomes a verb like all the other Nodes
Add conditionNodePairs functionality
Add errors variable and checkThis function in all Nodes
Edit the checkThis function for Decide nodes
Add more code for the example pseudocode
Create errors getter
Create getNext override for Decide Node
Add checkSim Logic
Edit run function to utilize new checkSim function