Optimization, cleanup, source codes

Another big update today. In this update I restructured source a bit.
Also, I added source codes of graphics and networking library what we
used to solution. And some more things:
- Finished script editor (added syntax highlighter)
- Started on cleaning SendData/HandleData codes by creating Pack and
Unpack procedures in base classes (for now I did this only for Items,
but later I will finish it also for rest of objects)
- Fixed some minor bugs