Sheldonys-zappa

* Fix for invalid values of HTTP_HOST and others (introduced in 0.48.0)

* Fix for an issue where you couldn't update a function if it had been deployed with a version prior to 0.48.0
* Support for private (VPC-only) API Gateway endpoints

* Deprecation of zappa.async because async is a reserved word in 3.7, please use zappa.asynchronous
* Support for Application Load Balancer as an alternative to API Gateway
* Improvements in manylinux wheel downloads
* Support for multi-value query strings
* Python 3.7 support
* Support for multi-value headers
* Support for the new 256kB async limit
* Bunch of small typos, fixes and documentation improvements
* Use Django 2 on tests with python 3
* Stop applying tags on buckets not created by zappa
* Be more forgiving on 504 errors during deployment
* Fix cleanup of DynamoDB table for async tasks
* Detection of invalid bucket names
* Flake8 checks added to tests

* Handle accounts with more than 100 domains in route 53
* Force requests upgrade to 2.20.0 for compatibility with urllib3 1.24
* Allow defining API Gateway policies (including restricting access to one IP address)

* Support for SQS events
* Added test to enforce running of doctoc
* Add support for running django as a WSGI app (for NewRelic and others)
* Updates AWS regions for lambda and API Gateway
* Fix support for gcloud and other packages with slim_handler
* Add --disable-keep-open to zappa tail
* Dependency updates
* Fix pyenv invocation
* Add custom base_path stripping support
* Multiple documentation fixes and improvements
* first iteration of a documented deploy policy

* hotfix for creating virtual environments