Merge pull request #11 from caternuson/iss10

Fix conversion factor

Author: ladyada

adafruit_max31855.py

@@ -88,4 +88,4 @@ def temperature(self):
     @property
     def reference_temperature(self):
         """Internal reference temperature in degrees Celsius."""
-        return self._read(True) * 0.625
+        return self._read(True) * 0.0625