add parser token types(nodePacketMember, nodePacketMembers)
check packet member duplication in right way (fix #3)
(trivial) remove unnecessary comments
Merge branch 'node-subclasses'

 - use NodePacketMember from parser.yy, not Node
 - call NodePacketMember->getName() from parser.yy, not getParsed(PARSE_AS_NAME) workaround
(trivial) merge redundant commit from node-subclasses branch

 - remove unnecessary comments