Iotedgehubdev

Added
* Support extended `createOptions`

Changed
* Update REST API version
* Fix "Error getting device scope result from IoTHub, HttpStatusCode: Unauthorized" issue after starting ([95](https://github.com/Azure/iotedgehubdev/issues/95))

Changed
* Fix "Error: 'environment'" when starting ([87](https://github.com/Azure/iotedgehubdev/issues/87))

Added
* Support environment variables set in the `env` section of a module
* Support getting credentials of multiple modules

Changed
* Always pull the EdgeHub image before starting
* Fix "the JSON object must be str, not 'bytes'" when starting on Python 3.5

Added
* Support networks and volumes in `createOptions`
* Support Windows container

Changed
* Remove requirement of `sudo` for `iotedgehubdev start` and `iotedgehubdev modulecred` command
* Rename EdgeHub runtime to IoT Edge simulator
* Fix a issue which causes duplicate D2C messages

Known Issues
* [67](https://github.com/Azure/iotedgehubdev/issues/67) Running Python and C modules which relies on SDK's support is not ready yet
* [62](https://github.com/Azure/iotedgehubdev/issues/62) Debugging C# modules may fail with Windows container due to incorrect timestamp
* [30](https://github.com/Azure/iotedgehubdev/issues/30) Debugging C# modules locally on macOS requires manually adding edge-device-ca.cert.pem to Keychain, and removing the EdgeModuleCACertificateFile environment variable