Refactoring use membrane for schema validation
Rename deploymnet_manifest > project_deployment
Added stemcells support
Name HelperTest less generic to prevent naming conflicts
Fix case where no release have been uploaded yet
Added stemcell and helper
Fix command path
Added stemcell support to prepare command
Reduce prepare_stecells complexity
Simplify prepare_releases
Added release helper specs
Move project_deployment_(stemcell/release) to their helpers
Added stemcell name_version
Make sure release can handle updated releases
Added stemcell prepare specs + refactor release specs
Merge branch 'master' into Upload-stemcell

Conflicts:
	lib/bosh/cli/commands/prepare.rb
	spec/commands/prepare_spec.rb
Merge pull request #16 from rkoster/Upload-stemcell

Upload stemcell