[COSM] Remove errors from the Map comment

There is no memory leak in std::map, see e.g.
See http://www.daniweb.com/software-development/cpp/threads/97849/deallocating-memory-used-by-a-stl-map
[ENH] Signals for VariableManager
[ENH] CGNS: Add file type option

Default is ADF, which was the old default in the CGNS lib
and is compatible with Fluent
[ENH] Allow choosing the dict in VTKXML writer
[ENH] ParallelDataToFields writes data in all continuous dicts
[FIX] Forgotten update_structure in BlockData
[FIX] Deal with empty entities list in ConnectivityData
[COSM] Typedef for GlbToLocT
[ENH] Add nearest_node_mapping function
[FIX] Forgotten test commits
[ENH] Zoltan Hypergraph partitioner initial commit