Added trigger reference to WaypointData, unused

WaypointData also inherits from Entity now, so I could alias Entity's API
for it too. I've also made a number of comment tweaks.

server/accounts/account_manager.cpp

@@ -219,7 +219,6 @@ void AccountManager::UnloadIf(std::function<bool(std::pair<const int, AccountDat
 //-------------------------
 
 AccountData* AccountManager::Get(int uid) {
-	//TODO: could this load an account first?
 	std::map<int, AccountData>::iterator it = elementMap.find(uid);
 
 	if (it == elementMap.end()) {