Pickle dicts (python-arq#123)

* dicts when pickling and better error catching

* returning JobResult and JobDef

* fix linting, tests for unpicklable

* more tests for pickling

* correct docs

Compatible with Python 3.6 (python-arq#122)

add run_check (python-arq#116)

* add run_check, fix python-arq#115

* fix job results

* better exception message

fix Worker redis_settings error

sort all_job_results

update history

uprev

uprev

netlify build PRs (python-arq#77)

* adding requirements.txt

* add runtime.txt

docker/aiohttp demo (python-arq#75)

* adding docker/aiohttp demo

* adding aiohttp docs, fix python-arq#69

* add history