Update README.md

README.md

 # DF Aggregator
 
 ## Recent Changes:
+- Power and Confidence range sliders have been updated to reflect data output by the KrakenSDR software.
 - Ellipse parameters are now automatically calculated. You can still adjust them
 if you want, but the auto-calculation works exceptionally well.
 - For previous changes see the [Change Log](CHANGELOG.md).