Adding isPositiveZero and isNegativeZero helpers.
Math.expm1 spec conformance.
Math.sinh spec conformance.
Math.tanh spec conformance.
Math.acosh spec conformance.
Math.asinh spec conformance.
Math.atanh spec conformance.
Math.hypot spec conformance.
Math.hypot2 removed from ES6 as of March 29th, 2012.
Math.trunc spec conformance.
Properly checking for signed zeroes in Math.sign tests.
Math.cbrt spec conformance.
Math.log1p spec conformance
Math.log2 spec conformance.
Math.log10 spec conformance
Merge pull request #42 from ljharb/math_spec_conformance

Math spec conformance
Fix code style.