add lua dependency to travis build
add lua dependency to travis build

peq/WurstScript,wurstscript/WurstScript,Cokemonkey11/WurstScript,peq/WurstScript,Cokemonkey11/WurstScript,peq/WurstScript,peq/WurstScript,Cokemonkey11/WurstScript,wurstscript/WurstScript,Cokemonkey11/WurstScript,wurstscript/WurstScript,Cokemonkey11/WurstScript