Fix capitalization for class names

[friedererdmann]

Currently inheritance can break between classes as classes might be capitalized or not. This leads to classes inheriting from Color but the class color was not capitalized. By default all class names should be CamelCased, also to avoid clashes with built-ins (like set and Set).

[friedererdmann]

Also: property names need to be lower case to avoid name clashes with class names.

[friedererdmann]

Fixed in 0de562a

• Classes are now CamelCase or at least Titlecase (upper case letters always win, so favoring CamelCase)
• Methods are now lowercase
• Attributes are now UPPERCASE
  • A fair amount of attributes clashed with python keywords if they were lowercase
  • Easier to distinguish methods and attributes at a glance

Might follow up with a specialty rule to change cases where methods might clash with keywords (currently they are removed, but might rename them to avoid naming clash instead).