Merge branch 'develop' into feature/platformio-30

* develop:
  Typo fix
  Version bump to 2.9.4
  Show "udev" warning only for the Linux OS while upload firmware
  Version bump to 2.9.3
  Notify Linux user to install PlatformIO udev rules
  Add new article
  Add support for Arduboy
  Remove unused imports
  Refactor firmware uploading to the embedded boards with SAM-BA bootloader
  Fix firmware uploading to the embedded boards with SAM-BA bootloader
  Add explanation about waiting for the new serial port
  Hook when new serial port is the same in boot mode
  Revert back some code linked with uploading to Leonardo/Due

# Conflicts:
#	platformio/__init__.py
#	platformio/boards/misc.json
#	platformio/builder/scripts/atmelavr.py
#	platformio/builder/scripts/atmelsam.py
#	platformio/builder/tools/pioupload.py

docs/platforms/atmelavr.rst

@@ -166,6 +166,26 @@ Adafruit
       - 8 Kb
       - 0.5 Kb
 
+Arduboy
+~~~~~~~
+
+.. list-table::
+    :header-rows:  1
+
+    * - Type ``board``
+      - Name
+      - Microcontroller
+      - Frequency
+      - Flash
+      - RAM
+
+    * - ``arduboy``
+      - `Arduboy <https://www.arduboy.com>`_
+      - ATMEGA32U4
+      - 16 MHz
+      - 32 Kb
+      - 2.5 Kb
+
 Arduino
 ~~~~~~~
 

docs/platforms/embedded_boards.rst

@@ -162,6 +162,26 @@ Adafruit
       - 8 Kb
       - 0.5 Kb
 
+Arduboy
+~~~~~~~
+
+.. list-table::
+    :header-rows:  1
+
+    * - Type ``board``
+      - Name
+      - Microcontroller
+      - Frequency
+      - Flash
+      - RAM
+
+    * - ``arduboy``
+      - `Arduboy <https://www.arduboy.com>`_
+      - ATMEGA32U4
+      - 16 MHz
+      - 32 Kb
+      - 2.5 Kb
+
 Arduino
 ~~~~~~~
 

docs/platforms/espressif_extra.rst

@@ -240,6 +240,7 @@ Using Arduino Framework with Staging version
 Articles
 --------
 
+* Jun 3, 2016 - **Daniel Eichhorn** - `ESP8266: Continuous Delivery Pipeline – Push To Production <http://blog.squix.org/2016/06/esp8266-continuous-delivery-pipeline-push-to-production.html>`_
 * May 29, 2016 - **Chris Synan** - `Reverse Engineer RF Remote Controller for IoT! <http://www.instructables.com/id/Reverse-Engineer-RF-Remote-Controller-for-IoT/?ALLSTEPS>`_
 * May 22, 2016 - **Pedro Minatel** - `Estação meteorológica com ESP8266 (Weather station with ESP8266, Portuguese) <http://pedrominatel.com.br/esp8266/estacao-meteorologica-com-esp8266/>`_
 * May 16, 2016 - **Pedro Minatel** - `Controle remoto WiFi com ESP8266 (WiFi remote control using ESP8266, Portuguese) <http://pedrominatel.com.br/esp8266/controle-remoto-wifi-com-esp8266/>`_