Temporary stop git log to build prerelease

* merge only annotated tag messages into release notes (espressif#1683)

Added instructions for installation with boards manager (espressif#1630)

* Added instructions for installation with boards manager (stolen directly from esp8266)

* changed to production link instead of dev

* Added to main README. Made mods to images as requested.

* Added links for development package

Fix HTTP client returning disconnected when there is still data avalable

Change esptool version notation

Broke HTTP_Method out into a separate library for reuse in ESPAsyncWe…

…bServer (espressif#1562)