Add support for List.Sort(IComparer).
Source of this change comes from AstrorEnales' change from pull request #239.
Implement Array.Clear().
In future the implementation could probably be replaced by a call to the ECMAScript6 Array.prototype.fill.
Merge pull request #360 from sdarnell/SortWithIComparer

Add support for List.Sort(IComparer).
Update history.txt
Use Array.prototype.fill if available.
Merge pull request #362 from sdarnell/ArrayClear

Implement Array.Clear().