Fix small typos

Author: aeddi

README.md

@@ -1,12 +1,12 @@
 # Python OpenCV module for AWS Lambda
 
-This is a simple script that build 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_funcion.py* and possibly your haar cascades files or additional Python modules. You can download directly a [pre-built archive](https://github.com/aeddi/aws-lambda-python-opencv/releases/download/Prebuilt/aws-lambda-python-opencv-prebuilt.zip).
+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
 - Package size without haar cascades included: 26MB
-- OpenCV 3.1 by default but may works with newer
+- OpenCV 3.1 by default but may work with newer
 
-**Need to be built on an Amazon Linux instance.**
+**Needs to be built on an Amazon Linux instance.**
 
 ## Module building
 ### Option 1: with an existing instance
@@ -15,12 +15,12 @@ This is a simple script that build a deployment package including OpenCV compati
 - Launch the script `cd aws-lambda-python-opencv-master && ./build.sh`
 
 ### Option 2: without an existing instance
-On the EC2 console, launch a new instance with:
+In the EC2 console, launch a new instance with:
 - Amazon Linux AMI
 - Role with S3 write permission
 - Shutdown behavior: *Terminate*
 - Paste the script below in the user data text field
-```sh
+```bash
 #!/bin/bash
 yum update -y
 yum install -y git cmake gcc-c++ gcc python-devel chrpath