Updating ES6 section numbers per http://wiki.ecmascript.org/lib/exe/fetch.php?id=harmony%3Aspecification_drafts&cache=cache&media=harmony:rev18_renumbering.pdf
Merge pull request #142 from ljharb/update_section_numbers

Updating ES6 section numbers
Adding Number.MIN_SAFE_INTEGER
Merge pull request #141 from ljharb/number_min_safe_integer

Adding Number.MIN_SAFE_INTEGER