message: new version of libsodium on Ubuntu 16.04.3
diff: @@ -104,6 +104,21 @@ ZMQ dependencies (provides ZMQ API 4.x):
  sudo apt-get install libzmq3-dev
  +3. On Ubuntu 16.04.3 you need to install the newest libsodium (at least 1.0.13)
  +
  + configure: error: Wrong libsodium: version >= 1.0.13 required
  +
  +I tested it with version 1.0.16 at it passes the `./configure` procedure.
  +
  +Building and isntalling <a href="https://github.com/jedisct1/libsodium/releases/tag/1.0.16">libsodium</a>:
  +
  + $ tar -zxf libsodium-1.0.16.tar.gz
  + $ cd libsodium-1.0.16
  + $ ./autogen.sh
  + $ ./configure
  + $ make
  + $ sudo make install
  +
  Dependencies for the GUI: Ubuntu & Debian
  -----------------------------------------
  