Add new article by @joshglendenning about "@Armstrap Eagle and @PlatformIO"

docs/articles.rst

@@ -27,6 +27,7 @@ Here are recent articles about PlatformIO:
 * Nov 06, 2015 - **nocd5** - `PlatformIOでmbedをオフラインビルドしSTM32 Nucleoボードでmrubyを使う (Use mruby in the offline build for STM32 Nucleo board with mbed and PlatformIO, Japanese) <http://qiita.com/nocd5/items/d5fda776240f7e7c17eb>`_
 * Oct 18, 2015 - **Nico Coetzee** - `First Arduino I2C Experience with PlatformIO <https://electronicventurer.wordpress.com/2015/10/18/first-arduino-i2c-experience/>`_
 * Sep 01, 2015 - **Thomas P. Weldon, Ph.D.** - `Improvised MBED FRDM-K64F Eclipse/PlatformIO Setup and Software Installation <http://thomasweldon.com/tpw/courses/embeddsp/p00pcFrdmK64_eclipsePlatformioSetup.html>`_
+* Aug 08, 2015 - **Josh Glendenning** - `Armstrap Eagle and PlatformIO <http://isobit.io/2015/08/08/armstrap.html>`_
 * Aug 01, 2015 - **Russell Davis** - `PlatformIO on the Raspberry Pi <http://www.russelldavis.org/2015/08/01/platformio-on-the-raspberry-pi/>`_
 * Jul 25, 2015 - **DinoTools** - `Erste Schritte mit PlatformIO (Getting Started with PlatformIO, German) <https://www.dinotools.de/2015/07/25/erste-schritte-mit-platformio/>`_
 * Jul 20, 2015 - **Eli Fatsi** - `Arduino Development in Atom Editor <http://viget.com/extend/arduino-development-in-atom-editor>`_

docs/projectconf.rst

@@ -530,6 +530,8 @@ Then upload firmware using :option:`platformio run --target program`
     board = armstrap_eagle512
     upload_protocol = gdb
 
+Also, take a look at this article `Armstrap Eagle and PlatformIO <http://isobit.io/2015/08/08/armstrap.html>`_.
+
 5. :ref:`platform_ststm32`: Upload firmware using ST-Link instead mbed's media
    disk