update SSDP to respond to generic URN

fix manifest.json construction

bump 3.1.3

Merge pull request #172 from konnected-io/aws-ota-fix

Fix OTA updates when connected to AWS.

Merge pull request #169 from konnected-io/mem-cleanup

memory cleanup

Merge pull request #168 from konnected-io/release-ota-file

Update release workflow to add OTA image.

retry if WiFi connect fails due to invalid password

update README

fix null value with momentary switch

properly handle momentary switch in AWS IoT; failsafe reconnect