Cortex

Integration of Cortex in CODES. Cortex can be enabled with --with-cortex=... when configuring CODES. When Cortex is enabled, it will be used in place of DUMPI and automatically translate MPI collectives using algorithms as implemented in Mpich.

This merge request also adds support for MPI_Sendrecv in the MPI replayer, and corrects an issue with CODES expecting the size of a posted MPI_Recv to match with the corresponding MPI_Send's size, which is not a requirement in the MPI standard.

See merge request !14

Updating dragonfly model to take into account multiple links connecting the chassis, updating config files and workload generator as well

Preparing beta version for new dragonfly model, modifications to routings, adding documentation for generating config files, adding libtools to support C++ code compilation

Bug fixes in different network models.

Change-Id: I2d673f6b4925e97efd79f3e383607068914cf78e

See merge request !13

Change-Id: I2d673f6b4925e97efd79f3e383607068914cf78e