added README.md

README.md

+BAO is a digital book analyzer and organizer. Its major goal relates the implementations of a set of functions for automatic classification  of e-books in various formats (pdf, djvu, epub).
+
+Actually, you need python2 to run it. In the future it will be fully python3-compatible. We suggest you to set up a python-virtualenv:
+
+```
+# install virtualenv, it depend on your O.S.
+$ virtualenv BAO-venv
+$ cd BAO-venv/bin
+$ source activate
+$ cd .. && git clone https://git.eigenlab.org/eigenlab/BAO.git
+```
+and to install needed libraries in your fresh virtualenv:
+
+```
+$ pip2 install python-magic PyPF2 xmltodict
+$ pip2 install --upgrade --ignore-installed slate==0.3 pdfminer==20110515
+```
+
+the last command is needed in order to make advanced text extraction work, as it installs compatible versions of slate and pdfminer.
+
+Lastly, you only need to specify the folder path you want to analyse (at the moment, analysis will be carried on only on files with type application/pdf).
+Now, everything should be fine (it will not, for sure: please, be patient!), and you can start the script simply as:
+
+```
+$ cd BAO-venv/BAO/
+$ python2 main.py
+```