DOC transfered wiki to sphinx-doc

* changed structure of index-file
* copied the WIKI at commit 67601b2d33f5a3cf8e9633e6ad92cca286840680
* adapted the markdown to rst

doc/user/installation.rst

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+************
+Installation
+************
+
+System preparation
+------------------
+
+1. Install the required
+   `dependencies <https://github.com/manpaz/python-escpos/wiki/Dependencies>`__
+
+2. Get the *Product ID* and *Vendor ID* from the lsusb command
+   ``# lsusb  Bus 002 Device 001: ID 1a2b:1a2b Device name``
+
+3. Create a udev rule to let users belonging to *dialout* group use the
+   printer. You can create the file
+   ``/etc/udev/rules.d/99-escpos.rules`` and add the following:
+   ``SUBSYSTEM=="usb", ATTRS{idVendor}=="1a2b", ATTRS{idProduct}=="1a2b", MODE="0664", GROUP="dialout"``
+   Replace *idVendor* and *idProduct* hex numbers with the ones that you
+   got from the previous step. Note that you can either, add yourself to
+   "dialout" group, or use another group you already belongs instead
+   "dialout" and set it in the ``GROUP`` parameter in the above rule.
+
+4. Restart udev ``# sudo service udev restart`` In some new systems it
+   is done with ``# sudo udevadm control --reload``
+
+Install
+-------
+
+* Clone python-escpos from github
+* Change directory to python-escpos and install the package
+
+   ::
+
+       # cd python-escpos
+       # python setup.py build
+       # sudo python setup.py install
+
+* Enjoy !!!
+
+