Packaging, dockerbuilder: Automate pushing docker binary packages
Fix a bug which caused builds to fail if ADD was the first command
Merge pull request #895 from dotcloud/build-fixes

- Builder: fix a bug which caused builds to fail if ADD was the first command
FIXMEs
Merge pull request #887 from dotcloud/761-packaging-dockerbuilder

Packaging, dockerbuilder: Automate pushing docker binary packages
Merge branch 'master' into builder_server-3

Conflicts:
	buildfile.go