fix typos
remove Number.MAX_INTEGER

Number.MAX_INTEGER is removed from rev17.
http://wiki.ecmascript.org/doku.php?id=harmony:specification_drafts#august_23_2013_draft_rev_17
fix WeakSet test
add TypedArray.prototype.{fill, copyWithin}

TypedArray.prototype.{fill, copyWithin} are added from rev17.
http://wiki.ecmascript.org/doku.php?id=harmony:specification_drafts#august_23_2013_draft_rev_17
change variable name in WeakSet test
Merge pull request #3 from syoichi/pr2-fix

Remove Number.MAX_INTEGER & Add TypedArray.prototype.{fill, copyWithin}