prime.create inconsistent on new vs older environments.

[jdalton]

Because prime.create uses native ES5 Object.create when available it will support prime.create(null), useful for creating blank data objects, in newer environments but not older environments. Also because it uses Object.create in newer environments it will support a second descriptors argument, but not in older environments.

[kamicane]

Closing, as the split-generics branch is now on master. object/create.js uses plain js.