Draft: Init new flow

• Redesigns the import sequence:
  • Starts from Tweets. For each tweet:
    • Author user is imported
    • Author is added as following or follower to "me" account
    • Mentioned users are imported

TODOs:

• Adapt progress. If possible, find out number of tweets at first.
• Handle "suspended user" import. (api.get_user on uspended users raises exception)

Question:

• Is it worth modifying the base Account item to include followers and following?