Update and rename rds_swiss.rb to aws_swiss.rb

Add support for ec2 security groups
Update poke.rb
Update plug.rb
Update metadata.rb
Update README.md
Merge pull request #1 from shlomoswidler/ec2-security-groups

Ec2 security groups
Typo
Oops, local var name
ports can be null... duh
interpret ports as a String
Only a single port number allowed
Update poke.rb
Update plug.rb
Only a single port allowed
more port
= instead of == Oops
Better syntax highlighting
minor refactor, correct logic
Bigger refactor
wrong comment, but right functionality