Create README.md

README.md

+# Cockatrice
+
+Cockatrice is an open-source multiplatform software for playing card games,
+such as Magic: The Gathering, over a network. It is fully client-server based
+to prevent any kind of cheating, though it supports single-player games without
+a network interface as well. Both client and server are written in Qt 4.
+
+# License
+
+Cockatrice is free software, licensed under the GPLv2; see COPYING for details.
+
+# Building
+
+Dependencies:
+
+- [Qt](http://qt-project.org/) 
+
+- [protobuf](http://code.google.com/p/protobuf/)
+
+- [CMake](http://www.cmake.org/)
+
+```
+mkdir build
+cd build
+cmake ..
+make
+make install
+```