Reported temp/humidity #s seem suspect

[ericklein]

Seeing temp and humidity values in MQTT (influxdb) that are well above what I'm seeing on the screen, more than a 5-6 sample average should be. +13 temp, +7% humidity. Check the algo

[ericklein]

averages were dividing by SAMPLE_SIZE although samples were stored starting at zero, so denominator off by 1. Fixed.