Proposal: move deisrel to the server

[Cryptophobia]

From @arschles on June 7, 2016 20:46

Currently, deisrel is just a CLI that runs all logic exclusively on the client's machine. Moving the core logic to the server and making the CLI just do RPCs to the server would provide benefits:

• Connect to a DB to keep a ledger of releases
  • This includes storing the global release notes for each release
• Use the DB to track status of an ongoing release
• Faster network-heavy operations such as docker tagging

This issue is a proposal and venue for brainstorming

Copied from original issue: deis/deisrel#83

[Cryptophobia]

From @vdice on June 16, 2016 21:51

This should also implement actual functionality (api calls) of forthcoming deisrel features in deis/deisrel#98, deis/deisrel#99 and deis/deisrel#89.

Meaning, the existing deisrel client would only retain the actual cli action, but functionality would just be a call to this server for appropriate actions, potentially returning any server responses to the cli user.