Revert nacl_demos.cpp to master.
Revert nacl_demos.cpp to master.

ronen/Halide,jiawen/Halide,damienfir/Halide,delcypher/Halide,mcanthony/Halide,tdenniston/Halide,kgnk/Halide,ayanazmat/Halide,adasworks/Halide,jiawen/Halide,dan-tull/Halide,rodrigob/Halide,damienfir/Halide,rodrigob/Halide,adasworks/Halide,fengzhyuan/Halide,fengzhyuan/Halide,jiawen/Halide,kgnk/Halide,damienfir/Halide,rodrigob/Halide,smxlong/Halide,jiawen/Halide,ronen/Halide,rodrigob/Halide,ayanazmat/Halide,dougkwan/Halide,mcanthony/Halide,delcypher/Halide,kgnk/Halide,jiawen/Halide,ayanazmat/Halide,ayanazmat/Halide,psuriana/Halide,ronen/Halide,fengzhyuan/Halide,myrtleTree33/Halide,damienfir/Halide,kgnk/Halide,dan-tull/Halide,kgnk/Halide,rodrigob/Halide,mcanthony/Halide,tdenniston/Halide,psuriana/Halide,tdenniston/Halide,dan-tull/Halide,myrtleTree33/Halide,smxlong/Halide,psuriana/Halide,smxlong/Halide,kenkuang1213/Halide,tdenniston/Halide,myrtleTree33/Halide,delcypher/Halide,mcanthony/Halide,ayanazmat/Halide,adasworks/Halide,delcypher/Halide,tdenniston/Halide,ronen/Halide,delcypher/Halide,adasworks/Halide,delcypher/Halide,psuriana/Halide,kenkuang1213/Halide,dougkwan/Halide,ronen/Halide,mcanthony/Halide,damienfir/Halide,dougkwan/Halide,dougkwan/Halide,dan-tull/Halide,damienfir/Halide,kenkuang1213/Halide,adasworks/Halide,smxlong/Halide,delcypher/Halide,ayanazmat/Halide,ayanazmat/Halide,kgnk/Halide,dan-tull/Halide,smxlong/Halide,kenkuang1213/Halide,jiawen/Halide,fengzhyuan/Halide,damienfir/Halide,delcypher/Halide,rodrigob/Halide,psuriana/Halide,ronen/Halide,dan-tull/Halide,fengzhyuan/Halide,tdenniston/Halide,myrtleTree33/Halide,smxlong/Halide,kenkuang1213/Halide,kenkuang1213/Halide,adasworks/Halide,adasworks/Halide,fengzhyuan/Halide,rodrigob/Halide,dougkwan/Halide,dougkwan/Halide,dougkwan/Halide,ronen/Halide,ayanazmat/Halide,smxlong/Halide,mcanthony/Halide,tdenniston/Halide,tdenniston/Halide,kenkuang1213/Halide,adasworks/Halide,fengzhyuan/Halide,myrtleTree33/Halide,jiawen/Halide,smxlong/Halide,kgnk/Halide,psuriana/Halide,myrtleTree33/Halide,mcanthony/Halide,dan-tull/Halide,fengzhyuan/Halide,mcanthony/Halide,kenkuang1213/Halide,ronen/Halide,kgnk/Halide,psuriana/Halide,rodrigob/Halide,dan-tull/Halide,myrtleTree33/Halide,damienfir/Halide,dougkwan/Halide,myrtleTree33/Halide