Function to load custom configuration of user defined values. Adds to the existing environment. User should load a new configuration prior to master script.
config.load(myFile, myExt = "R")
Configuration file (including path if not in working directory)
"R" or "RDS"
NA, values in file added to environment "ContData.env".
Custom config files must **not** include `ContData.env <- new.env(parent = emptyenv())`. This will create a 2nd environment that will not be accessed by the functions in the package.