Gunrock 0.3.0

Gunrock release 0.3 is a feature release that adds two new graph primitives—Stochastic Approach for Link-Structure Analysis (SALSA) and Minimal Spanning Tree (MST)—and improves several existing primitives. The new release uses a unified framework for both single-GPU and single-node multi-GPUs. Five graph primitives (BFS, CC, PR, BC, and SSSP) can be launched on multi-GPUs now by adding the command-line option--device=GPU_index_1,GPU_index_2,...,GPU_index_n. A simple pure C interface allow users to easily integrate Gunrock into their own work. A stats-logging and performance-chart-generating pipeline is prototyped in this new release. All our future releases will require C++11 support.