v1.6.0 to fix severe limitation to permit sending larger data than 2K buffer, to add CORS feature and to use allman astyle

Please use this version with normal ESP8266/ESP32-AT.

Releases v1.6.0

1. Fix severe limitation to permit sending larger data than 2K buffer
2. Add example ATWebServer_BigData to demo how to send larger data than 2K buffer
3. Modify example AdvancedWebServer to demo how to send larger data than 2K buffer
4. Add new features, such as CORS, etc.
5. Use allman astyle and add utils
6. Update Packages' Patches