cudaEI connected to optimization code and unit test available in gpp_expected_improvement_gpu_test.cpp
Merge branch 'master' of github.com:sc932/MOE into jialei_gh270_connect_cudaEI_to_optimization_algorithm

Conflicts:
	moe/optimal_learning/cpp/gpp_core.cpp
	moe/optimal_learning/cpp/gpp_expected_improvement_gpu.cpp
	moe/optimal_learning/cpp/gpp_expected_improvement_gpu.hpp
	moe/optimal_learning/cpp/gpp_expected_improvement_gpu_test.cpp
Merge branch 'jialei_gh297_speed_up_gpu_computation_on_EI_gradEI' of github.com:sc932/MOE into jialei_gh270_connect_cudaEI_to_optimization_algorithm
gpu opt test online
updated version
copied documentation deleted, gpu optimization test time shorten by reducing num_steps to 100 and increasing tolerance of gradEI at endpoint to 7e-3
fix for comments
another round of comments fixed
changelog modified
Merge pull request #365 from Yelp/jialei_gh270_connect_cudaEI_to_optimization_algorithm

Jialei gh270 connect cuda ei to optimization algorithm