updated readme

Author: amri2k

README.md

@@ -36,6 +36,12 @@ Install library dependencies
 pip install -r requirements.txt
 ```
 
+After downloading all files, extract them in the same base folder using the following command:
+
+```
+cat *.tar.gz | tar -xzf - -i
+```
+
 ### How to use
 
 To list the available command line arguments type
@@ -97,4 +103,4 @@ We provide three simple examples in the `examples` folder:
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.