XML streaming added to public image search to avoid OOP.

Conflicts:
	src/main/java/org/dasein/cloud/aws/RegionsAndZones.java
	src/main/java/org/dasein/cloud/aws/network/ElasticIP.java
	src/main/java/org/dasein/cloud/aws/platform/RDS.java
Merge pull request #137 from maksimov/develop

XML streaming added to public image search to avoid OOP.