docs/wipy: Add more tutorials and examples.

docs/wipy/tutorial/blynk.rst

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+Getting started with Blynk and the WiPy
+---------------------------------------
+
+Blynk is a platform with iOS and Android apps to control
+Arduino, Raspberry Pi and the likes over the Internet.
+You can easily build graphic interfaces for all your
+projects by simply dragging and dropping widgets.
+
+There are several examples available that work out-of-the-box with
+the WiPy. Before anything else, make sure that your WiPy is running
+the latest software, check :ref:`OTA How-To <wipy_firmware_upgrade>` for instructions.
+
+1. Get the `Blynk library <https://github.com/wipy/wipy/blob/master/lib/blynk/BlynkLib.py>`_ and put it in ``/flash/lib/`` via FTP.
+2. Get the `Blynk examples <https://github.com/wipy/wipy/tree/master/examples/blynk>`_ edit the network settings, and afterwards
+   upload them to ``/flash/lib/`` via FTP as well.
+3. Follow the instructions on each example to setup the Blynk dashboard on your smartphone or tablet.
+4. Give it a try, for instance::
+
+   >>> execfile('01_simple.py')