Add README.md
Add ProtoCall diagram for README.md
Update links in README.md to point to GitHub
Update clone URL in README.md
Update boost/crc.hpp and move to boostcrc namespace

Use bcp on version 1.55 to move boost/crc.hpp into separate boostcrc
namespace. The following command was used:

./bcp --namespace=boostcrc boost/crc.hpp /tmp/boost