modified nodeid parser to know about namespaces
fixed spec/check for load namespace
fixed UA_NodeId_copycstring
removed unused variables from test to make travis happy
added spec/check for loading namespace from xml
solved #80

had to extract include/ua_types from include/ua_basictypes to prevent
circular dependencies.
Merge remote-tracking branch 'origin/master' into connection_secureChannel
created new structure to handle sessions