Modulo performance, accuracy, and member expression fixes

fix: Modulo performance and simplify tests

fix: Modulo negatives
fix: Modulo accuracy issue on OSX with `integerCorrectionModulo`
fix: Follow naming convention `div_with_int_check` to `divWithIntCheck`
fix: Member expression with function
fix: CPU variable assignment
fix: `gpu.addFunction` needed to be before createKernel and documentation
fix: mandelbulb.html from above .addFunction