mention for setup.py installation

Author: ab-anand

README.rst

@@ -5,7 +5,7 @@
 Filezen
 =======
 
-|pypi| |readthedocs.org| |license| |build|
+|pypi| |readthedocs.org| |license| |build| |version|
 
 *An Intelligent file organizer module which reads your file storing pattern & move
 the cluttered files accordingly!*
@@ -75,6 +75,10 @@ Option 2: Installing from source (Only if you must)
     $ pip install -r requirements.txt
     $ python setup.py install
 
+**Note:** If you get ``permission denied`` then
+``$ sudo python setup.py install`` should fix that
+
+
 Usage
 -----
 `[back to top] <https://github.com/ab-anand/Filezen#filezen>`__
@@ -203,4 +207,6 @@ Built with ♥ by `Abhinav Anand <https://github.com/ab-anand/>`__ under the `MI
    :target: https://github.com/ab-anand/FileZen
 .. |pypi| image:: https://img.shields.io/pypi/pyversions/Filezen
     :target: https://pypi.org/project/Filezen/
+.. |version| image:: https://badge.fury.io/py/Filezen.svg
+    :target: https://pypi.org/project/Filezen/