Update README.md

Author: 256dpi

README.md

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 # arduino-mqtt
 
-**MQTT library for arduino based on the Eclipse Paho projects**
+**MQTT library for Arduino based on the Eclipse Paho projects**
 
 This library bundles the [Embedded MQTT C/C++ Client](https://eclipse.org/paho/clients/c/embedded/) library of the Eclipse Paho project and adds a thin wrapper to get an Arduino like API. Additionally there is an drop-in alternative for the Arduino Yùn that uses a python based client on the linux processor and a binary interface to lower program space usage on the Arduino side.