Introduce reflection system (RTTI)

[Witek902]

We need that for easy serialization/deserialization, class object factories, etc.

Features:

• [x] registering fundamental types (int, bool, float, etc.)
• [x] registering complex types (classes)
  • [x] with and without dynamic type information (dynamic type information will force a class to be polymorphic)
  • [x] tracking class hierarchy, abstract classes, etc.
  • [x] registering class members:
  • [x] simple types / objects
  • [x] static arrays
  • [x] pointers to objects - requires research and discussion
• [x] custom dynamic_cast
• [x] object factory (create object from type)
• [x] text serialization
• [x] dynamic arrays support
• [x] strings support