Update README.md documentation

Added:
    - Web UI feature, directory and setup reference.

Change-Id: Ie3f9facf255adad9a4bee4418087c4b7ca5563ed
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/README.md b/README.md
index 3bf8133..e9dc636 100755
--- a/README.md
+++ b/README.md
@@ -17,6 +17,7 @@
 * IPMI support
 * Factory reset
 * RAS (Reliability, availability and serviceability)
+* Web UI testing
 
 **Debugging Supported List**
 * SOL collection
@@ -49,6 +50,7 @@
  - [CONTRIBUTING.md](CONTRIBUTING.md): Coding guidelines.
  - [REST-cheatsheet.md](https://github.com/openbmc/docs/blob/master/REST-cheatsheet.md): Quick reference for some common
    curl commands required for testing.
+ - [README.md](https://github.com/openbmc/phosphor-webui/blob/master/README.md): Web UI setup reference.
 
 ## Testing Setup Steps ##
 
@@ -84,6 +86,8 @@
 `ras/`: Contains test cases for RAS (Reliability, availability and
         serviceability).
 
+`gui/`: Contains test cases for web UI and security scanning tool automation.
+
 `tools/`: Contains various tools.
 
 `templates/`: Contains sample code examples and setup testing.