Merge branch 'release/1.3.0' into develop

* release/1.3.0:
  Update changelog
  Bump version to 1.3.0
Select Ec2Manager-created snapshots based on a description prefix, not a tag

It turns out tags arne't public....
Minor log message changes
Bump version to 1.3.1
Update changelog
Merge branch 'release/1.3.1'

* release/1.3.1:
  Update changelog
  Bump version to 1.3.1
  Minor log message changes
  Select Ec2Manager-created snapshots based on a description prefix, not a tag