MPI: Mapping from ContextID to real Policy Context
Finished ContextID --> MPIContext map

 * Context is now independent from Communicationpolicy
 * Not sure about mapping of nodes to communicators
   --> could be in or outside (or even policy)
       of comunicator
NameService manages mapping between vertex and communicator now
Trying to create subgraphs in BGL

 Its not possible to create subgraphs from
 pure adjacent_list based graphs. Need to
 be wrapped in subgraph. There seems to be
 some issues with bundled properties -.-
Started communication on Vertex base

  GraphCommunicator combines Graph, NameService and Communicator
  Makes it possible to run communication functions on
  Vertex base (p2p, collectives)
First prototype (reduce) for collectives based on vertices
Introduced static template variable for vertex collectives

 Static variable per type that will
 be reduced etc.