RP-37
RP-37

- added the multithread merge structure
- cleanup
- start of the main thread implementation

git-svn-id: 609522d7d408cfa97e9ff3bac4923f7fa96011fc@110 3149698f-976c-419d-aa71-eec1decff2c2

MPI-IS/Grassmann-Averages-PCA,MPI-IS/Grassmann-Averages-PCA