update README to reflect the ability to specify multiple rules in commands
update README to reflect the ability to specify multiple rules in commands

realm/SwiftLint,jeffreybergier/SwiftLint,victorpimentel/SwiftLint,victorpimentel/SwiftLint,realm/SwiftLint,jeffreybergier/SwiftLint,firebase/SwiftLint,victorpimentel/SwiftLint,lyft/SwiftLint,victorpimentel/SwiftLint,firebase/SwiftLint,Johnykutty/SwiftLint,lyft/SwiftLint,Johnykutty/SwiftLint,jeffreybergier/SwiftLint,Johnykutty/SwiftLint,firebase/SwiftLint,realm/SwiftLint,firebase/SwiftLint,Johnykutty/SwiftLint,lyft/SwiftLint,jeffreybergier/SwiftLint,lyft/SwiftLint,realm/SwiftLint