Don't show the EC2 Credentials panel if there is no EC2 service

Fixes bug #1102411

Change-Id: I2454b415ac99f19349f4a19a1358fc75d8307fba
Final versioning for 2012.2.3

Change-Id: Ic83a1c1617ad74b931f54f1755bc9dcecfe2c527
Bump version to 2012.2.4

Set version to 2012.2.4, but with final=False

Change-Id: I9dab1dc62e41cdb4143a3c8083e65c4b13a22eb4
disable debug, move web root
take variables out of compressed output
Merge branch 'f18-patches' of github.com:fedora-openstack/horizon into f18-patches