Allow specifying EC2 instance types besides t1.micro
Update boto library version
Full support for AWS regions outside us-east-1

- Sets up boto connection with the appropriate region (auto-detected from user-specified zone)
- Instances running in these regions can be queried successfully with "report" command
- Fixes launching of private AMIs outside default us-east-1 region
Merge branch 'full_zone_support'
Fallback to ~/.ssh/id_rsa if named SSH key not found
Print DNS name as well as public IP
Don't fail when URL is not publicly reachable