Don't pass too many arguments

`.apply()` has a max argument length which was easily exceeded by a large buffer. This makes more calls to `String.fromCharCode` but is guaranteed not to throw a `RangeError`.

More on max argument size: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/apply#Using_apply_and_built-in_functions
Merge pull request #20 from joeybaker/patch-1

Don't pass too many arguments