Slight change in how the css classes get added

[epykachu]

Hello, in the Html.py module I have changed the order of the pyClassNames so that the latest added classes get precedence in the css world:

elif pyClassNames is not None:
  pyClsNames = [cls.get_ref() if hasattr(cls, 'get_ref') else cls for cls in pyClassNames['main']][::-1]

this fixes an issue whereby all the classes that were defined previously would take precedence over the newly defined attributes.

Let me know if there's a cleaner to achieve this.

[epykachu]

Didn't fix it properly