Remove not_a_pointer hack in favor of C++11 type_traits
Remove not_a_pointer hack in favor of C++11 type_traits

jiawen/Halide,psuriana/Halide,kgnk/Halide,psuriana/Halide,ronen/Halide,jiawen/Halide,ronen/Halide,kgnk/Halide,kgnk/Halide,jiawen/Halide,jiawen/Halide,psuriana/Halide,psuriana/Halide,jiawen/Halide,kgnk/Halide,jiawen/Halide,kgnk/Halide,kgnk/Halide,ronen/Halide,ronen/Halide,kgnk/Halide,psuriana/Halide,psuriana/Halide,ronen/Halide,jiawen/Halide,psuriana/Halide,ronen/Halide,ronen/Halide,kgnk/Halide,ronen/Halide