v1.2

Internal changes:

1. Reorganised the C# project into two projects, GameEngine and Adventurer, to separate the UI from the Game Engine,
2. Tidied up the code,
3. Added more helpful comments,
4. Added a new export option to export a DAT with comments,
5. Changes the DAT file parse to use a RegEx, simplifying the code.

External changes:

1. Added an icon.