update readme.md

add some small fixes
Update README.md
Update README.md
added sendToAll/sendToTarget and multiple projects
rename project -> socket
Adapted for new cow server
Merge branch 'master' of https://github.com/Geodan/cow
Merge pull request #116 from bertt/master

added sendToTarget/sendToAll and multiple sockets
Merge pull request #28 from Geodan/master

merge from origin