upgrade etcd to 0.3
bump go to 1.2
Merge pull request #295 from cloudfoundry/etcd-0.3

upgrade etcd to 0.3
Bump src/warden

Bump cloudfoundry/warden:
  Tammer Saleh:
     Backfill spec for #49 ( Travis Success: https://travis-ci.org/cloudfoundry/warden/builds/19286404 )
     Merge remote-tracking branch 'origin/pr/49' ( Travis Unknown )
  Mike Heath:
     Dispatch results are logged at debug level instead of info. ( Travis Unknown )
Bump src/cloud_controller_ng

Bump cloudfoundry/cloud_controller_ng:
  Onsi Fakhouri:
     Generate environment variables in CC for diego staging message ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/19285299 )

Signed-off-by: Maria Shaldibina <mariash@pivotallabs.com>