Podstawowy model Switch'a, adresy źródłowe/docelowe IP i MAC w package
Update README.md
Metoda acceptPackage z argumentem port, adres IP/MAC w klasie Port, generowanie losowego MAC adresu, poprawki w Switchu.
Poprawka setMAC
Merge origin/feature/switch into feature/switch

Conflicts:
	src/main/java/pl/edu/pk/iti/copperAnt/network/Computer.java
	src/main/java/pl/edu/pk/iti/copperAnt/network/Device.java
	src/main/java/pl/edu/pk/iti/copperAnt/network/Hub.java
	src/main/java/pl/edu/pk/iti/copperAnt/network/Router.java
	src/main/java/pl/edu/pk/iti/copperAnt/network/Switch.java
	src/test/java/pl/edu/pk/iti/copperAnt/simulation/MockDevice.java
updates from fetaure/switch