More details for the README.md

README.md

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-# upython_si5351
+# upython_si5351
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+This project to port the Arduino code for the [Adafruit Si5351 Clock Generator Breakout](https://learn.adafruit.com/adafruit-si5351-clock-generator-breakout/overview "Adafruit Si5351 Clock Generator Breakout") to [Micropython](http://docs.micropython.org/en/latest/esp8266/esp8266/quickref.html "micropython") for the ESP8266. 
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+The original sources are available [here](https://github.com/adafruit/Adafruit_Si5351_Library). The Adafruit library was written by Limor Fried/Ladyada forJ Adafruit Industries and distributed under a BSD license, all text above must be included in any redistribution.
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+Support Adafruit as they invest time and resources by providing open source code for their products.
+
+