Squashed from the following commits:
* Update pep0484.py
(I don't think I want to know why the cursor jumped to the beginning of the line with every keystroke in GitHub's online editor. Change was entered backwards.)
* Added test for inline use of NewType. Currently assuming that wrapped instances should get the underlying type.
* Altered tests per https://github.com/davidhalter/jedi/issues/1015#issuecomment-356131566
* Add NewTypeFunction to typing evaluation module
* Update AUTHORS.txt
* Add a new test, and a speculative justification
For now, address only the second comment
* Copy code from third comment on the PR
From inspection, I *believe* I understand what this code is doing, and as such, I believe this should cause the new test I added in response to the second comment to fail, because that test is based on faulty assumptions.
* Explicitly discard the key from the tuple
* Update pep0484_typing.py
* Test for the wrapped type, not the wrapper "type"
* Change the return value from calling a NewType
