added instructions for running
tree4e076129dd2817a99e803d9bb11767aa9ec84bd7
-rw-r--r-- 34811 raytracer.erl
-rwxr-xr-x 86 run-concurrent.sh
-rwxr-xr-x 112 run-distributed.sh
-rwxr-xr-x 82 run.sh