Add PlatfromIO section

README.md

@@ -18,6 +18,7 @@ If you're into "generic" AVR programming, I'm happy to tell you that all relevan
 * **[How to install](#how-to-install)**
 	- [Boards Manager Installation](#boards-manager-installation)
 	- [Manual Installation](#manual-installation)
+	- [PlatformIO](#platformio)
 * **[Getting started with MiniCore](#getting-started-with-minicore)**
 * [Wiring reference](#wiring-reference) 
 * **[Pinout](#pinout)**
@@ -140,6 +141,11 @@ This installation method requires Arduino IDE version 1.6.4 or greater.
 Click on the "Download ZIP" button in the upper right corner. Exctract the ZIP file, and move the extracted folder to the location "**~/Documents/Arduino/hardware**". Create the "hardware" folder if it doesn't exist.
 Open Arduino IDE, and a new category in the boards menu called "MiniCore" will show up.
 
+#### PlatformIO
+[PlatformIO](http://platformio.org) is an open source ecosystem for IoT development and supports MiniCore.
+
+**See [PlatformIO.md](https://github.com/MCUdude/MiniCore/blob/master/PlatformIO.md) for more information.*
+
 
 ## Getting started with MiniCore
 Ok, so you're downloaded and installed MiniCore, but how to get started? Here's a quick guide: