Update README.md (#228)

Added prerequisites for plugin installation.

Author: ajmay-aws

README.md

@@ -9,11 +9,19 @@ Usage
 
 If you are using this package to build resource providers for CloudFormation, install the [CloudFormation CLI Java Plugin](https://github.com/aws-cloudformation/cloudformation-cli-java-plugin) - this will automatically install the the [CloudFormation CLI](https://github.com/aws-cloudformation/cloudformation-cli)! A Python virtual environment is recommended.
 
+**Prerequisites**
+
+ - Python version 3.6 or above
+ - Your choice of Java IDE
+ - Lombok: The code generated by the CloudFormation CLI uses [Lombok](https://projectlombok.org/), which requires support in IDEs for some syntax highlighting to work. For the best development experience, it is recommended you install Lombok support in your IDE.
+
+**Installation**
+
 ```shell
 pip3 install cloudformation-cli-java-plugin
 ```
 
-Refer to the documentation for the [CloudFormation CLI](https://github.com/aws-cloudformation/cloudformation-cli) for usage instructions.
+Refer to the [CloudFormation CLI User Guide](https://docs.aws.amazon.com/cloudformation-cli/latest/userguide/resource-types.html) for the [CloudFormation CLI](https://github.com/aws-cloudformation/cloudformation-cli) for usage instructions.
 
 Development
 -----------