Test for parsing empty tags from image listing response
Added flags needed for Windows platform to be able to return encrypted password through getVMPassword
Call to decide classic vs VPC returns attributeValueSet not accountValueSet

Conflicts:
	src/main/java/org/dasein/cloud/aws/AWSCloud.java
Fix for firewall issues and elastic IP issues with EC2-classic (FB #4425)
Refactored duplicated getClient() method out of various places and moved to AWSCloud. Added gzip compression support.