bindVariable  can now change accessLevels
makeAccessLevel now raises  a meaningful message if it cannot build a valid AccessLevelFlag
fix bug occuring when activate session is received without a corresponding createSession
refactor to get smaller functions
improve way to construct ExpandedNodeId
dump read nodesToRead and Datavalues
remove trace output
carryingon  default server objet binding
fix encoding/decoding of extension object created from nodeset.xml