Fixes #435

Note: Already uses the updated DataView function lengths from tc39/ecma262#266 (ES2016 Draft 2015-12-20)

- String case functions iterate over code points
- Has called before Get in Array.p.reverse
- Add test for web-compat Array.p.splice behaviour; Plus missing test for no arguments case
- ToObject no longer applied to this-value in Array.p.toLocaleString
- ToObject no longer applied to this-value in Object.p.toLocaleString
- Add tests for Object.p.propertyIsEnumerable and symbol property keys
- Add tests for Object.p.hasOwnProperty and symbol property keys
- Test property descriptor attributes of message property
- Tests for RegExp constructor checks
- Date constructor when called with date object
- TimeClip never returns negative zero

- fixed a false positive where argument-passed-null.js was returning a TypeError from 22.1.2.1 step 5
- created 2 tests from argument-passed-null to assert this as null and items as null
- fixed reference info on Array.from_arity.js
- fix tests at Array.from_forwards-length-for-array-likes
- static checks on calling-from-valid-1-onlyStrict.js
- static checks on calling-from-valid-1-noStrict.js
- static checks on calling-from-valid-2.js
- removed create-typedarray-from.js, that test belong to es6id 22.2.2.1
- removed mapfn-invalid-typeerror-1.js - false positive from 22.1.2.1 step 5
- moved mapfn-invalid-typeerror-2.js to more spread tests where mapfn is not callable
- ...

An extra newline in a comment prevented the import from being parsed properly.

- Remove duplicate word
- Add missing license

Limit tests to behavior of method when invoked with an iterable.