Fix Ref() to output the name only [GH-17]

Ref needed to be changed to look for BaseAWSObject.
Add Ref test.
Fix some IAM issues

- Make Policy property work again
- Policy prop should be Users, not User
- Have more explicit error checking with list types
Bumping version to 0.3.3
Adding separators options to print to json function
Correct default separators
Merge pull request #19 from DiegoVazquezNanini/feature/separators

Adding separators option to json_dump
Adding Heat Namespace
Minor fix
Adding a TODO
Adding a sm example
Adding separators and default separators
sm-TEST.py
Adding more maps and starting to improve Securitygroups
Last update of the day. SGs still need some work
Adding ASG Notification
Some more improvements
More fun with security groups
Move improvements to the general template
Almost here