Enhancement proposal for Cloudformation templates

[Pelirrojo]

Below are two small additions to the cloudformation base templates. These include:

• Example of Parameters
• Example of Outputs
• Example of Intrinsic Functions
• Example of Comments
• Visual interface improvements (AWS::CloudFormation::Interface)

The main improvement is that these templates are tested and work and help to generate modular templates that accept parameters and have easily reusable outputs

[Pelirrojo]

Hello,

With this pull request I would like to offer an improvement in the cloudformation base templates, currently they only create one EC2 resource and I suggest that they have the four most common sections and an example of comments.

The same example is in the two accepted formats: json and yaml.

Do you find it interesting to merge it? Is there any contributing document that you have not seen or followed?

Thanks in advance,
Manuel