Address: added getPrefix() function for Address, IPv4Address, ManetAddress classes
ManetAddress: removed setPrefix() function
manet: uses Address instead of ManetAddress, and remove unused ManetAddress
uses INetworkProtocolControlInfo instead of {IPv4|IPv6}ControlInfo
dymo: getMacAddress() should not delete the dgram parameter, should delete it by caller
dymoum: getMacAddress() renamed to storeMacAddressIpAddressPairOf(); it's a const function
manet: removed Address(Address x) usage