Add Simple Mustache Service demo gif

Author: aeddi

README.md

@@ -1,5 +1,11 @@
 # Python OpenCV module for AWS Lambda
 
+<p align="center">
+	<img src="http://i.imgur.com/70rGBsz.gif" alt="Simple Mustache Service demo"/><br>
+	<i><b>Simple Mustache Service</b> is an AWS Lambda demo that use this module</i>
+</p>
+
+## Description
 This is a simple script that builds a deployment package including OpenCV compatible with the AWS Lambda Python runtime. The dynamic library is compiled with all extended instruction sets supported by Lambda CPU and binaries are stripped to save space. You simply need to add your code inside *lambda_function.py* and possibly your haar cascades files or additional Python modules. You can directly download a [pre-built archive](https://github.com/aeddi/aws-lambda-python-opencv/releases/download/Prebuilt/aws-lambda-python-opencv-prebuilt.zip).
 
 - Build duration: ~20 min on T2.micro / ~15 min on C4.2xlarge