Add support for pulling out virtualization type when parsing AWS
Describe Instances results.
Ignore tags
NextMarker => NextToken. Maybe that's what it used to be...?
Merge remote-tracking branch 'upstream/master'

Conflicts:
	lib/fog/aws/parsers/cloud_watch/list_metrics.rb
Merge pull request #1506 from cloudability/master

Add support for a few missing AWS tags in cloudwatch:ListMetrics and ec2:DescribeInstances