Minor needed changes in ml-model

[AML14]

@darthdaver I need these changes in the ML model for the main program:

• Some README updates.
• ClassModifier class was wrong in the resources file.
• The server must return both the token value (first line) and class (second line) in the HTTP response.

Can you check whether these changes make sense and, otherwise, come up with a better way (e.g., a more Pythonic way) to implement them?