Create a folder for world files

Signed-off-by: Eduardo L. Buratti <elb09@c3sl.ufpr.br>
Add project Makefile

Signed-off-by: Eduardo L. Buratti <elb09@c3sl.ufpr.br>
Add swarm.cpp and robot.{cpp,h} to source directory

Signed-off-by: Eduardo L. Buratti <elb09@c3sl.ufpr.br>
Add projects .gitignore

Signed-off-by: Eduardo L. Buratti <elb09@c3sl.ufpr.br>