Small README changes

Author: BastienTr

README.md

@@ -1,7 +1,7 @@
 
 
 [![Build Status](https://secure.travis-ci.org/veeresht/CommPy.svg?branch=master)](https://secure.travis-ci.org/veeresht/CommPy)
-[![Coverage](https://coveralls.io/repos/veeresht/CommPy/badge.svg)](https://coveralls.io/r/veeresht/CommPy)
+[![Coverage](https://coveralls.io/repos/veeresht/CommPy/badge.svg?branch=master)](https://coveralls.io/r/veeresht/CommPy)
 [![PyPi](https://badge.fury.io/py/scikit-commpy.svg)](https://badge.fury.io/py/scikit-commpy)
 [![Docs](https://readthedocs.org/projects/commpy/badge/?version=latest)](http://commpy.readthedocs.io/en/latest/?badge=latest)
 
@@ -37,6 +37,9 @@ Available Features
 - Binary Symmetric Channel (BSC)
 - Binary AWGN Channel (BAWGNC)
 
+[Wifi 802.11 Simulation Class](https://github.com/veeresht/CommPy/blob/master/commpy/wifi80211.py)
+- A class to simulate the transmissions and receiving parameters of physical layer 802.11 (currently till VHT (ac)).
+
 [Filters](https://github.com/veeresht/CommPy/blob/master/commpy/filters.py)
 -------
 - Rectangular