khcnz

Add board details for compiling ESP8285 variant

1

Need to add boards variant and associated ld scipts for 8295

Currently the code makes some assumptions about the flash layout that I don't think hold true on larger flash sizes (sonoff pow?) requires further investigation

Proposed changes for Rest Sensor to better detect XML responses

2

## Proposed change Make the existing rest sensor documentation clearer that xml is a supported response type for the REST sensor, and detail new ways that HA will determine that...