* origin/dmw:
issue #459: initial get_stats() implementation
tests: fallout from #447.
core: use ModuleNotFoundError in imporer if it is available; closes#448.
core: throw error on duplicate add_handler(); closes#447.
service: unregister receiver at shutdown; closes#445.
issue #326: update Changelog.
d2eb01f tests: pin idna to last supporting 2.6-compat version.
b90889c tests: pin idna to last supporting 2.6-compat version.
9da6e6a tests: don't call Router.shutdown() twice.
b2b7e7b tests: file_service_test fixes
04755c3 issue #426: tighten up PushFileService types.
8fa3c74 issue #426: RouterMonitor format incorrect for 3->2 forward.
d8b9634 issue #426: PushFileService missing to_text() call.
1e9f344 issue #426: big hack so reset_connection has task_var access
18bfde5 issue #444: update Changelog.
835bead tests: allow running scripts from any subdir.
81c93e1 ci: remove duplicate /usr/bin/time call
ca9ae45 issue #426: TemporaryEnvironment must coerce to Unicode.
4bc0d0e issue #426: apply_mode_spec() must handle bytes.
a8921bb tests: fix scaling in fork_histogram
374a361 docs: try to fix CSS difference between local and rtfd
861be2e docs: wrap text around logos
b084d83 docs: fit SVG viewbox to ansible logo
98d06e2 docs: delete shame.rst to make room for new chapters.
5f3244a docs: import pcaps (using LFS) to regenerate charts.
6936b93 tests: import fork_histogram.py.
5a96d13 issue #426: fix all.yml sorting, one more delegate_to
bd82fa1 issue #426: fix low_level_execute_command.yml breakage.
a6e6bc4 issue #426: to_text filter.
d15f533 Turn on Travis build notifcations, but send them to IRC.
9d87f03 issue #426: disable Ansible smart transport.
49d37bf issue #426: remove LANG and LC_ALL during tests.
a6e6fd1 issue #426: more 2->3 test fixes.
67f710f issue #426: use delegate_to in fixup_perms2 and copy.yml
a67a436 docs: add #374 to Changelog.
2b229a6 docs: add thanks entry.
David Wilson