Generates a 1-4 axis plot from desired variables. Designed to help
user understand how the model is working, how the variables are interacting.
     
    
    Usage
    rswap_plot_multi(project_path, vars, show = NULL, verbose = F)
 
    
    Arguments
- project_path
- path to project directory (string) 
- vars
- list of variables to include in the plot (string/vector) 
- show
- list of variables to show by default (string/vector) 
- verbose
- print status? (flag) 
 
    
    Details
    currently supports "H", "WC", "DRAINAGE", "TEMP". Working on expanding