Merge pull request #8 from lennym/improvement/README

Merge pull request #7 from lennym/bugfix/mismatched-scripts

Include `AWS_ACCOUNT_ID` in the list of environment variables to set

Use square brackets for environment variable placeholders

Fix mismatched script calls in package.json

Adds notes about testing to the readme

Adds more notes to readme

Adds tests

Adds tests

Adds notes to readme

Updates readme with info on aws cli

Adds links to get an aws account

Updates versions

Updates readme

Updates readme