RRO 2019 version

Birdi7requested to merge
develop into master
  1. New relations of data: user->competition->meal||transport||housing instead of user->region->meal||transport||housing
  2. New way to import participants objects. Refer to readme.md for more info.
  3. Closes #9
  4. Add examples of data to import
  5. Remove Master classes schedule
  6. Remove Taxi schedule
  7. Remove Attache info functionality

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