196 gui kernel

This merge requests is the beginning of the gui component of the DFSS client.

- It adds several makefile instructions to build the gui with docker on linux, but these instructions and the gui code are ignored by the CI
- It adds two screens for the GUI: registration and authentication
- GUI configuration is stored in $HOME/.dfss directory

For testing this MR, please try to:

- Compile the GUI on your computer using the provided docker commands:
  - `make prepare_gui`
  - `make gui`
- Test it
- Open .ui files with QtCreator

See merge request !44

[t][p] Add TTP authentication and start cmd



See merge request !43

190 platform sign init

This MR is huge because its tests cannot be divided.

This is global MR for the following taiga stories:
- 190
- 191
- 325

See merge request !41

311 dfssd log sorting

This is quick work, I'll take any insight.
I didn't do it, but an integration test using mutex can be nice.

See merge request !42

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

- common package now contains a waitingGroup, a useful struct to deal
  with synchronization
- updated version of gRPC api should be more efficient for signature
  initialization (untested)

193 ttp server



See merge request !39

[net] Add support for direct IP connection

- Rewrite the TLS authenticator to ignore DNS/IP verification
- Still as secure as previous implementation

See merge request !40

- Rewrite the TLS authenticator to ignore DNS/IP verification
- Still as secure as previous implementation

189 sign sequence generation

Introduce sequence generation into the platform.

See merge request !36

327 Add MIT license



See merge request !37

[c] Fix cross-compilation for register command

This is a hotfix and should be pushed against v0.0.2

See merge request !38

Add import and export command - US 183



See merge request !35

[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