Feature/messages

[sbenemerito]

• Now shows messages
• Adjustments to bot scoring
• Now converts knowledge statements to lowercase, to avoid same statements with different casing. Ex: 'Who are you?' and 'who are you?'
• Apparently numpy.float64 was a child class of the Python float class, so instead of checking if a similarity vector is an instance of a Python float, we now check if it is a numpy float.
• Now shows bot tags in bot details
• Fix editing suggested knowledges (previously, you could only edit the first entry)