Add README.md for github
This is my first attempt to pull/merge changes from remote to local. On
remote I have added Windows/Visual C++ solution/project files and created
a thc.cpp and thc.h file to avoid the need for a thc library (inspired by
sqlite3.c and .h)
Merge branch 'development' of https://github.com/billforsternz/tarrasch-chess-gui into development
Adjust XCode files for new thc.cpp thc.h arrangement