Add rating bar to the TUM-IDP-WS-20 / simple-recommender

[MelikeSila]

Add a rating bar to the simple-recommender website to take feedback from users

• [x] Create database connection
• [x] Add a rating bar
• [x] Keep the following data to analyze the result and improve the model

  • User Input
  • Currently used method ( e.g in the order lemmatization, remove stop words, LDA, etc.)
  • User rating taken from rating bar
  • Output

[farukcankaya]

Implemented in the following:

1. fix/formatting
2. feature/add_rating_star
3. feature/multiple_models