infragram in GL doesn't accept JS Math.foo() functions

[jywarren]

I tried Math.floor(R) but it got converted to:

float rr = r.r(r);

I think it probably happens around https://github.com/p-v-o-s/infragram-js/blob/master/public/infragram-gl.coffee#L113 but am not sure

I also know we have to get rid of .toLowerCase() and I'm getting rid of .toUpperCase() in the -js version, so that it doesn't turn Math into MATH.