Update array/generator comprehension to match rev15
[[GetP]] -> [[Get]], [[SetP]] -> [[Set]] (rev15)
ObjectCreate and Property Definition Evaluation updates (rev15)
Update 'super'-keyword parsing and runtime evaluation (rev15)
CallExpression no longer IsValidSimpleAssignmentTarget (rev15)
for-of statement updates: iteration value now AssignmentExpression (rev15)
Update 'Property Definition Evaluation' to use DefinePropertyOrThrow (rev15)
ClassBody is always strict code (rev15)
Add static-methods to classes (rev15)
Throw TypeError if 'classClass' is not a Constructor (rev15)
Only create default constructor if ClassHeritage is present (rev15)
Update MakeConstructor to match latest draft (rev15)
Add abstract operation ToPositiveInteger (rev15)
Add abstract operation SameValueZero (rev15)
Update 'Object Internal Methods' to match latest draft (rev15)
Add abstract operation GetPrototypeFromConstructor (rev15)
Add [[ArrayInitializationState]] internal data property to exotic array (rev15)
Built-in objects' prototypes changed to ordinary objects (rev15)
Add StringCreate and @@create (rev15)
Number.toInt -> Number.toInteger (rev15)