add sointu, add song, update shader_minifier

src/shaders/fragment.frag

@@ -9,7 +9,6 @@
 uniform int m;
 out vec4 o;
 float u_time = m/float(44100);
-//uniform float u_time;
 const float PI = 22./7.;
 
 vec3 no(vec3 v) { return normalize(v); }