GUI-337: IAM Policy Generator

Implements most of the policy generator for https://eucalyptus.atlassian.net/browse/GUI-337

Notes:
- "VM type", "IP address or range", and "Availability zone" were removed to be consistent with the possible resource type choices per AWS docs, as they apply to conditions per se.
- Moving the "All [resources]" choice into the input rather than in an expando significantly simplifies the code base.  Need to discuss with @JMoLo 
- Actions that don't pertain to a resource type will not display the add resource option.  Only the "Add conditions" will display.  May need to update the wireframe to better handle this case.
- The "Add conditions" feature will be implemented later