modified:   proof_of_work/main.cpp
	modified:   proof_of_work/main.h
	modified:   proof_of_work/proof_of_work.vcxproj
	modified:   proof_of_work/proof_of_work.vcxproj.filters
	new file:   proof_of_work/Server.h
	new file:   proof_of_work/server.cpp
	deleted:    proof_of_work/sha256.cpp