* enabled Cairo rendering with lines, curves, and PNG; even Draw:Rect/RectFill/Circ
* enabled Screen:PrintString via Cairo text-rendering; to be refined
* enabled key-binding (Key:New)
* fixed GetVal's C++ translation
* fixed C++ mis-translations
- JIO_SynFor's
- Engine_TableLookUp_Create
- typeFunction::CheckParameter
- IsTokenDeclared
- `else's implementation
* fixed Mid to work as per FreeBASIC's functionality
* few clean-ups here and there