Feat/authenticated api server

[FirelightFlagboy]

The goal is to implement the authenticated part of the api using the http protocol.

TODO

• [x] Add test on the server side
  • [x] Valid request
  • [x] Api-Version
    • [x] Missing header
    • [x] Incompatible version
    • [x] different but compatible version (revision changed)
  • [x] Authorization
    • [x] Missing header
    • [x] Invalid value
  • [x] Author
    • [x] Missing header
    • [x] Author not found in database
  • [x] Timestamp
    • [x] Missing header
  • [x] Signature
    • [x] Missing header
    • [x] Invalid Signature

Questions

• [x] Were the api_version come from ? the api_version will be located in the header API_VERSION
• [x] Is the Api-Version Header received from the user is correctly used ?
  • [x] Need to settle with the api version used
  • [x] Need to send the Api-Version that the serve will be using
• [x] What to do with the timestamp ? Wont be used right now
• [ ] Should parsec.api.protocol have its own version module ?

depends on #2338 closes #2624