Added user = ubuntu for all AWS locations (using U 12.04 LTS AMIs).
Tried aws-ec2.user = root, but this global parameter did not propigate.
Release note for 0.5.0.
Minor final tweaks to Release Notes.
Merge pull request #684 from jdtoy/0-5-0-release-notes

Release notes: 0.5.0 (GA)
Merge pull request #744 from jdtoy/brooklyn-properties-ubuntu

DOCS 0.5: Bug fix for getting started brooklyn.properties.
Fix issue with ApplicationResourceIntegrationTest.testDeployRedisApplication by implementing proper, longer timeout