Add 3 new bots and 1 race

Add 3 New Bots for Race 20
Add 1 new race 20
add main.inc in to gitignore
Add Race 21 and Race 22

Add Race 21 with Bots
Add Race 22 with Bots
Thats Last Race for the Release
Merge branch 'master' of https://github.com/GRGServer/SAMPRacing