made change to prerequisites

Author: eagle00789

README.md

@@ -20,7 +20,7 @@ Prerequisites
 -----------------
 Debian based system (tested on Ubuntu, Debian, Raspbian)  
 Python 2.7+  
-Needed modules are delivered with the probe package:  
+Needed modules are installed using the setup.py install phase:  
 - pyasn1 (https://pypi.python.org/pypi/pyasn1/0.1.7)  
 - pysnmp (https://pypi.python.org/pypi/pysnmp/4.2.5)  
 - requests (https://pypi.python.org/pypi/requests/2.5.3)