[auth] Ignore hostname verification in tls

See https://golang.org/src/crypto/x509/verify.go#L347 for explanation

See merge request !34

[p][c] Use bytes instead of strings for hashes



See merge request !33

188 ttp kernel

Implement TTP `dfsst` kernel

See merge request !31

186 integration tests

- Client now exits on error
- Platform now logs mail errors without noticing the client. We consider that a mail problem is not fatal

See merge request !32

[c] Fix password question on non-unix terminals



See merge request !30

[c][p] Some fixes after real tests

- 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

See merge request !29

[CI] Add automatic build

- Add automatic binary generation for windows, linux and darwin
  + Binaries are pushed to http://static.lesterpig.com/dfss (tls will come soon)
  + The build is done ONLY in `master` branch AND on version tags
- Remove the use of "user.HomeDir", because it is not compatible with linux xcompilation

See merge request !28

- 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

[c] Add `new` command

- Update platform mockup
- Fix hash bug in platform

See merge request !25

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

[p/contract] Add authentication in postContract



See merge request !27

179 client auth request

Client authentication command.

See merge request !26

178 platform create user

Handle Register and Auth requests
- validity check
- database update
- redudant requests
- gRPC answer messages

See merge request !24

[c] Add show command



See merge request !23

[DFSSC] Add register command to the client



See merge request !22

175 dfssd api

Implement demonstrator API to log any actions.

See merge request !18

180 platform create contract

Missing bits for this MR:

- Authentication checks
- Invitation triggers
- Improved mail tests

This will be fixed in a future MR.

See merge request !21