Versioning, Release, Changelog, Install

[psteinb]

What?

• Add a git tag before the hackathon
• Create a release after the hackathon is done.
• Make sure that setup.py and installation instructions still work
• Inquire about continuous integration
• Properly comment ReversibleGraphNet and Node, it's a recursive nightmare
• Fix the issue with ReversibleGraphNet._buffers (i.e. edges on the computation graph)
  not freeing once they are no longer needed, and also being included in state_dict()
• Write some kind of changelog to put in the README, to let people know what has changed

Difficulty? 1/5

[wapu]

I moved the commenting and the buffer problem to individual issues to make it easier to assign and track them. The remaining points can all be seen as "github bookkeeping" of sorts.

[ardizzone]

• Add a git tag before the hackathon
• Create a release after the hackathon is done.
• Make sure that setup.py and installation instructions still work
• Write some kind of changelog to put in the README, to let people know what has changed