Parsl/parsl

* remove __del__ method and merge to close method in MonitoringHub

* address yadu's comment -  add back __del__ method

* switch __del__ and close methods

* Support automatic task logging

This adds a special value `parsl.AUTO_LOGNAME` that can be passed to the
special `stdout` or `stderr` keyword args for apps. I did not use an
enum because there is only one value.

The behavior can be summarized as:

stdout=parsl.AUTO_LOGGING -> stdout written to 'runinfo/AAA/task_logs/BBBB/task_CCC_DDD_EEE.stdout'
stdout='test.stdout' -> stdout written to 'test.stdout'
stdout=None -> no stdout
no stdout in signature -> no stdout

where
AAA = run number
BBBB = int(task id / 10000) (so we have directories with 10k entries each)
CCC = task id
DDD = app name
EEE = optional task label

Fixes #871.

* Cleaner error reporting

* Adding a default entry in manager dict to avoid keyError. Removed unnecessary loglines

* Adding manual tests for error suppression and exception strings

* Removing some dead code

* Adding docstring to manual test

Add hostname to monitoring in TASK table

Add missing app.py

This must have gotten lost in the merge. Fixes #981.

Fixing issue with workflow name, and workflow duration

Fix typo in monitoring import

Fixes #971.

* Removing the doc skipping code

* Skipping PEP 741 check on variable passed to external library

…#966)

This reverts commit ae7f0ca.

Merge the viz server

Unfortunately this is a keyword arg to a plotly class.

* Enforce policy that source dirs must have __init__.py

* attempt to fix travis' strange quoting of newly added test commands

* Add a CI test for exex - broken, see issue #916

* install flake8 from test deps, extreme_scale deps; use pip not setup.py

* Make mpi worker pool report number of workers, to fix #916

* doc wording changes

* fixing language and removing "hub_port=55055

* fixing English and removing "hub_port=55055" (default) from monitoring

* small additional fix

* typo

* Adding citation to faq

* Updating the doi link in text.

Fixes #957.

* Describe Files as they are now

* remove data manager references in file doc

Also: automatically update 'all' in extras_require so that we do not
need to remember to update it when we add dependencies.

 Conflicts:
	.flake8
	MANIFEST.in
	requirements.txt
	setup.py

Fixes #958.

but set up is

Prior to this commit, the tests in:

* test_docs_1.py
* test_implicit_staging_ftp.py

would not successfully run in pytest, as their module names were not being
picked up by pytest correctly.

These tests were not running, and so not failing in CI, because those
tests are explictly disabled in CI using the 'cleannet' mark. Travis
does not provide a suitably clean network environment for those tests to
run.

Those tests can be run (and were failing, but now pass) on my laptop on
a residential DSL connection.