[Merge] lp:~nataliabidart/ubuntu-dev-tools/multiple-series-for-project-upload into lp:ubuntu-dev-tools

[Naty Bidart]

> This doesn't support the case where a milestone exists but has no release yet.
> 
> Otherwise it looks good

Can you please explain what the script should do in that case? I'll be happy to add that code.
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https://code.launchpad.net/~nataliabidart/ubuntu-dev-tools/multiple-series-for-project-upload/+merge/36354
Your team Ubuntu Development Team is requested to review the proposed merge of lp:~nataliabidart/ubuntu-dev-tools/multiple-series-for-project-upload into lp:ubuntu-dev-tools.