Add iOS7/iOS8 results for ES6
Add Array.prototype.contains to ES7 table.
Updated WebKit and IE results

WebKit now supports the ES6 Number constants and some String methods.

This also closes #245.
Merge pull request #254 from ziyunfei/Array#contains

Add Array.prototype.contains to ES7 table.
Merge pull request #255 from webbedspace/webkit

Updated WebKit and IE results
%TypedArray% from, of, indexOf, lastIndexOf, join