Merge branch 'master' into develop
Fix issues with 1.5.6 support
Improve logging around tag api acquisition
Report correct provider in service-properties
Make credentials-provider more robust
Make tag queries return nil if tags unsupported
Use lein and publish to com.palletops on clojars
Reverse logic for credentials supplier check

Checks for the presence of the Credentials annotation, as this is more reliable.
Update tests for latest pallet 0.8.0
Updated project.clj, release notes and readme for 1.5.3
Merge branch 'release/1.5.3'