Update package installation in README.md

Change-Id: I59662d1bdd8702662922b1ccfa97d4d79db0d4af
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/README.md b/README.md
index e9c23fd..b5d3781 100644
--- a/README.md
+++ b/README.md
@@ -42,6 +42,9 @@
 Packages required to be installed for OpenBmc Automation.
 Install the packages and it's dependencies via `pip`
 
+If using Python 3.x, use the corresponding `pip3` to install packages.
+Note: Older Python 2.x is not actively supported.
+
     REST base packages:
     ```
     $ pip install -U requests
@@ -62,13 +65,17 @@
     $ pip install robotframework-scplibrary
     ```
 
+    Installing requirement dependencies:
+    ```
+    $ pip install -r requirements.txt
+    ```
+    you'll find this file once your clone openbmc-test-automation repository.
+
     Installing tox:
     ```
     $ pip install -U tox
     ```
 
-If using Python 3.x, use the corresponding `pip3` to install packages.
-
 ## OpenBMC Test Development ##
 
 These documents contain details on developing OpenBMC test code and debugging.