Fix that specifies the correct url endpoints based on regions.
Merge pull request #40 from binod33/2013.04

Fix that specifies the correct url endpoints based on regions.
Issue #42: Removed main association constraint when fetching routing table for a subnet
Issue #43: Fixed a bug in which the wrong parameter was being passed to AWS when fetching metrics
[maven-release-plugin] prepare release dasein-cloud-aws-2013.04.3
[maven-release-plugin] prepare for next development iteration
Merge branch '2013.04'