Cheatgrass-wildfire feedback loop is not an option within InputData_Rgroup.csv

[kpalmqui]

All fire options (prescribed fire, wildfire) are available and can be requested within InputData_Rgroup.csv, but not wildfire due to cheatgrass abundance.

Thus, it is not currently possible to run simulations concurrently with cheatgrass-wildfire and no wildfire for example. This is because the flag to turn the cheatgrass-widlfire loop on is at the bottom of the rgroup_template.in file and is fixed for all simulations for a given site.

This issue will add wildfire due to cheatgrass abundance as an option to InputData_Rgroup.csv and implement new text parsing to ensure the flag at the bottom of the rgroup.in file is approrpriately set to 0/1.