small changes
Just pull
Merge branch 'master' of https://github.com/ray-chu/gpgpu-sim-new
Memory request and bandwidth added. Two way to moniter it.
1. They are profiled into mannual dump file. In dram_request_bandwidth and dram_response_bandwidth columns.
2. Dump into bw_stats file. Uncomment parts gpgpu_sim::cycle()  in gpu-sim files.