Closes python/core-workflow#14

These include spelling/grammar fixes, removing some outdated prose,
updating some superseded prose, and adding/cleaning up some links.

Also rewraps the entire file at 79 columns.

 various updates from upstream python/typing repo:

- Added typing.Counter and typing.ChainMap generics
- More flexible typing.NamedTuple
- Improved generic ABC caching
- More tests
- Bugfixes
- Other updates

* Add Misc/NEWS entry

* Add issue number

* Add a paragraph at the top for users, not builders, of Python.

* Use nicer rst url syntax to avoid borking paragraphs in the plain text.

Badges are small images which gives the status of the Travis CI and
the coverage percentage of Codecode. It helps to check the status of
the Travis CI and to get the link to Travis CI.

See also https://shields.io/

Currently, http://buildbot.python.org/all/buildslaves/ware-docs
buildbot is only run as post-commit. For example, bpo-29521 (PR#41)
introduced two warnings, unnotified by the Travis CI docs job.

Modify the docs job to run toosl/rstlint.py.

Fix also the two minor warnings which causes the buildbot slave to
fail.

Much of bpo-29521 was fixed in parallel with commit 
e7ffb99f .  This cleans up the rest.

Apply parallel change to Doc/make.bat to read 
"set SPHINXOPTS=-D latex_elements.papersize="
I don't have a Windows system on which to observe the warning,
but it should be necessary.

The warning:

.../workspace/cpython_github/Doc/faq/windows.rst:303: 
    WARNING: unknown option: -t

In the Windows FAQ, `How do I keep editors from inserting tabs 
into my Python source?`, contained a reference to a Python -t
option. In Python 2.x, this caused Python to issue warnings
about lines with mixed spaces and tabs, but as of Python 3.6
it does nothing. 
 
Per discussion at http://bugs.python.org/issue29387, take
their wording. Python [3] raises an IndentationError or 
TabError. Tabnanny is now a module.

Set name to "_curses.window" instead of "_curses.curses window" (with
a space!?).

EasyDialogs was removed in 3.x. fallback_getpass will always be the answer here.
ff47a133

* bpo-28929: Link the documentation to its source file on GitHub

Change the documentation's `Show Source` link on the left menu
to GitHub source file.

* change version to master

* Move all functions to call objects in a new Objects/call.c file.
* Rename fast_function() to _PyFunction_FastCallKeywords().
* Copy null_error() from Objects/abstract.c
* Inline type_error() in call.c to not have to copy it, it was only
  called once.
* Export _PyEval_EvalCodeWithName() since it is now called
  from call.c.

There were some grammatical errors in weakref.WeakValueDictionary
documentation.

It took me quite a bit to figure out what this was referring to,
since the given issue number is wrong, and the original commit
message I found through git blame lists a different, also wrong
issue number... see https://bugs.python.org/issue27122#msg279449

* Fix some deprecation warnings in Doc/conf.py
* Fix an rst error in Misc/NEWS

Update also the Release Schedule to Python 3.7.

If the IRC notification is stored in plaintext, then anyone who forks
the repository and also adds it to travis will send notifications to
the IRC channel for their fork by default. Since the secure variable
is encrypted using a repository specific key, this will only work when
it is being built using the correct repository.

bpo-29527.

This file will be displayed to contributors when they create a pull request in any branch (hence why it is not written in a branch-specific way).

Sorry, I didn't want to push this change before the review :-( I was pushing a
change into the 2.7 branch.

* Move all functions to call objects in a new Objects/call.c file.
* Rename fast_function() to _PyFunction_FastCallKeywords().
* Copy null_error() from Objects/abstract.c
* Inline type_error() in call.c to not have to copy it, it was only
  called once.
* Export _PyEval_EvalCodeWithName() since it is now called
  from call.c.

Issue #29100: On Windows, datetime.datetime.fromtimestamp(min_ts) fails with an
OSError in test_timestamp_limits().

Issue #29100: Catch OverflowError in the new test_timestamp_limits() test.

Issue #29100: Fix datetime.fromtimestamp() regression introduced in Python
3.6.0: check minimum and maximum years.