Implement TypedArray updates to index handling

[bterlson]

ECMAScript unified the handling of indexes across all the TypedArray and related data structures. A number of minor semantics have changed.

[akroshg]

Isn't this the one what @ianwjhalliday is fixing?

[ianwjhalliday]

This looks like a superset of what I fixed.

I can revisit this later, or someone from the language team can pick this up and continue from my changes.

[dilijev]

Adding references to other issues mentioned: #2014 #2016

[dilijev]

Fixed by #2289
Then reverted by #2350

[atulkatti]

The PR #2350 only reverted some changes that may cause integer overflow. However, other spec changes for issue #1391 have not been reverted. So this issue can be closed.