SE-216: Upgrade Spring to 3.2.2
Increment build version; increment Ambra import to 2.6.3
Merge branch 'dev/SE-216' into release/2.6.3rc
Add wagon-ssh extension (allows deployment under Maven 3)
Downgrade wagon-ssh extension version to 2.2

There is a documented bug with later versions:
http://jira.codehaus.org/browse/WAGON-393
Merge branch 'master' of github.com:PLOS/ambra-admin into release/2.6.3rc