Update pyserial.rst

Add conda instructions.  Reference both the conda default channel and conda-forge channel

Author: shaunwbell

documentation/pyserial.rst

@@ -76,6 +76,21 @@ Using the `python`/`python3` executable of the desired version (2.7/3.x).
 Developers also may be interested to get the source archive, because it
 contains examples, tests and the this documentation.
 
+From Conda
+----------
+pySerial can be installed from Conda::
+
+    conda install pyserial
+    
+    or
+    
+    conda install -c conda-forge pyserial
+    
+Currently the default conda channel will provide version 2.7 whereas the
+conda-forge channel provides the current 3.x version.
+
+Conda: https://www.continuum.io/downloads
+
 From source (zip/tar.gz or checkout)
 ------------------------------------
 Download the archive from http://pypi.python.org/pypi/pyserial or