SGS prints more about incoming request
Support creating resource attachments in service gateway
Support omitting resource_id in SGS create_attachment
Minor policy precondition fixes and resource_lifecycle policy changes
Merge pull request #579 from shenrie/master

Minor policy precondition fixes and resource_lifecycle policy changes
Use convert_unicode as common funnel, note problem with it
Merge pull request #578 from daf/attachment

Support creating resource attachments in service gateway