Default archive deployment_datetime arg to nil
Merge pull request #27 from ncdc/fix-gear-archive-test

Default archive deployment_datetime arg to nil
Remove app-archives directory

Instead of creating app-archives, let the user upload a binary
deployment archive anywhere they have permission

Remove deployment_func_test as it didn't really have any value above
the unit tests and scaling_func_test

Add unit tests for update_proxy_status
Merge pull request #29 from ncdc/binary-deployments

Remove app-archives directory
Fix call to extract_deployment_archive
Add error handling