add hello-world.lua example
add hello-world.lua example

this example is meant to showcase basic moongen functionality
based on a somewhat realistic example: testing a QoS-aware middlebox

wenhuizhang/MoonGen,NetronomeMoongen/MoonGen,duk3luk3/MoonGen,gallenmu/MoonGen,kidaa/MoonGen,gallenmu/MoonGen,pavel-odintsov/MoonGen,werpat/MoonGen,wenhuizhang/MoonGen,werpat/MoonGen,dschoeffm/MoonGen,pavel-odintsov/MoonGen,emmericp/MoonGen,gallenmu/MoonGen,schoenb/MoonGen,emmericp/MoonGen,slyon/MoonGen,scholzd/MoonGen,NetronomeMoongen/MoonGen,dschoeffm/MoonGen,emmericp/MoonGen,bmichalo/MoonGen,gallenmu/MoonGen,gallenmu/MoonGen,wenhuizhang/MoonGen,atheurer/MoonGen,NetronomeMoongen/MoonGen,bmichalo/MoonGen,kidaa/MoonGen,atheurer/MoonGen,scholzd/MoonGen,gallenmu/MoonGen,pavel-odintsov/MoonGen,schoenb/MoonGen,kidaa/MoonGen,schoenb/MoonGen,slyon/MoonGen,dschoeffm/MoonGen,bmichalo/MoonGen,duk3luk3/MoonGen,atheurer/MoonGen,gallenmu/MoonGen,slyon/MoonGen,bmichalo/MoonGen,scholzd/MoonGen,slyon/MoonGen,werpat/MoonGen,gallenmu/MoonGen,duk3luk3/MoonGen