[FEATURE REQUEST] Allow config.yaml file name to be an input option

[hannahnesser]

We replaced all arguments with a reference to config.yaml. The changes are pretty simple, but mainly:

• The operator is now run as python main.py config_name.yaml
• We removed the statements that opened config files in each of the component python parts
• The config file is now passed more frequently as an argument to functions, though where possible I pass sub-components of the config file
• The satellite parsers now have the format function(file_name, data_fields) instead of function(file_name, satellite_name)