Merge pull request #229 from adafruit/add-DS2484

Add DS2484 hosting DS18b20 temperature sensor

Author: tyeth

components/i2c/ds2484/definition.json

@@ -0,0 +1,10 @@
+{
+  "displayName": "DS2484",
+  "vendor": "Maxim Integrated",
+  "productURL": "https://www.adafruit.com/product/5976",
+  "documentationURL": "https://learn.adafruit.com/adafruit-dps310-precision-barometric-pressure-sensor",
+  "description": "Adafruit DS2484 I2C to 1-Wire Bus Adapter Breakout - Converts a single DS18b20 temperature sensor to I2C",
+  "published": false,
+  "i2cAddresses": [ "0x18" ],
+  "subcomponents": [ "ambient-temp", "ambient-temp-fahrenheit" ]
+}