taegeonum/bdcs-assignment1 — pull request #2 by taegeonum (2014-10-13 05:33:17+00:00)
Title: Basic group communcation logic 

### Complete basic group communcation logic

For ML, I need to distribute the data and compute the data parallel. After that, I need to aggregate the parallel computed data.
To implement above things, I uses two tasks: MLAggregateTask and MLComputeTask.

MLAggregateTask: aggregate the partial computed data from MLComputeTask and re-broadcast the aggregated data to MLComputeTask.
MLComputeTask: computes SGD with SVM and sends the data to the MLAggregateTask.

In order to implement these communication, I uses group communication API.
This pull request contains basic group communication logic for the above communication.