REQUIRED the OMNETPP 4.3 !!!
notifierconsts: convert enums to registerSignal() usage
removed the unused NF_LINK_REFRESH
REFACTORING: Uses signals instead NotificationBoard
renames: category to signalID, details to obj
IPv4InterfaceData, IPv6InterfaceData: emit on interfacetable instead of MAC module
Ieee80211AgentSTA, Ieee80211MgmtSTA: signal sending fixes
@signal