disable light switch for dry contact mode

Update CHANGELOG.md

bugfix: passwords do not match message missing from html.

Update CHANGELOG.md

Update web page image and mark release date in changelog

set release date in change log

Update README. CHANGELOG and web page screen shots

Monitor and log memory heap fragmentation

Make obstruction detection ignore spurrious detections

Merged from esphome-ratgdo
ratgdo/esphome-ratgdo@fd8e602

Co-Authored-by: J. Nick Koston <[email protected]>
Co-Authored-by: Marius Muja <[email protected]>

check_flash_MD5 was checking wrong area of flash