GitLab

- Add mgdb entities to handle resolution protocol
- Add unit tests

- Factorizes code between promises and signatures
- Add a cooldown before starting the first round
- Add demonstrator trace in integration tests

+ Fix alignement issue in dfssd/api
+ Add `TODO` for GetAllButOne complexity
+ Re-order vendor in sequence_analysis_test.go
+ Fix shadowing by refining var
+ and plenty of other fixes...

- Signatures are written to a file called `$email-$contractUUID.proof`
- Close connection client-side
- Preserve peer connections

- Fix missing sequence initialization
- Fix missing answer in grpc handlers
- Fix hashToID key issue
- Do all rounds of promises

Fix #3 - Should be merged asap in 192 branch

See !41

- Use uint32 instead of int for sequence generation
- Send sequence in READY message
- Check that DFSS file has not been compromised
- Remove sequence from DFSS file
- Use more explicit output for client during signature

- Add a method in `dfss/auth` package to compute a certificate's hash
- Update `dfssp/contract.Builder` to allow `dfssp/user` package to
  trigger some mail emissions
- Update `dfssp/user` to fix authentication (bad expiration and bad
  certHash)
- Fix a critical bug in client during creation of new contract (nil
  pointer)

TG-293 #ready

- Update platform mockup
- Fix hash bug in platform
- Fix CLI interactions