Tortuga/misc/refactoring fun/README.md

This particular refactoring stage was absolute hell, mostly because I was wrestling with a severe bout of depression too. So, I've added the diffs, and a scary screenshot of the git console.

There are three diff files because server/server_application.cpp was split into two files: server/server_internals.cpp and server/server_connections.cpp, each with it's own diff.