Error if reaction label contains a comma

[clemenskreutz]

If the description of a reaction (i.e. last entry in a line in the REACTIONS part of the model def contains a comma, an error is thrown:

No error:
REACTIONS
-> Resident CUSTOM "prod*foldProdRes/Feedback_prod" "Production self-renewal"

Error:
REACTIONS
-> Resident CUSTOM "prod*foldProdRes/Feedback_prod" "Production self-renewal, test"