Updated readme
Minor readme improvements
Fixed readme: Runscript receives ID of EC2 instance not its name
Updated readme to align with latest RDS code
Merge branch 'feature/readme' of github.com:hamidnazari/aws-security-pictures into hamidnazari-feature/readme

Conflicts:
	README.md
Merge pull request #16 from hamidnazari/feature/readme

Updated readme