Conf: Add the contains method. 
This checks if the array contains a variable that matches the 
input String.
Conf: Add indexOf method.
Conf: Change setValue to use indexOf method.
Conf: equals to equalsIgnoreCase
Conf: Create prompt method. 
Prompt without input will prompt for all null values. 
Prompt with input will prompt or create value if it doesn't exist.
Conf: Close Scanner.
Conf: Rename getter/setter methods. 
Rename getValue - get
Rename setValue - set