Initial commit of The Quest of Kwirk's Castle.

The following notes apply:
- the source code is now released under Mozilla Public License 2.0 which allows the game's code to be used in propritary applications, but requires that the code itself is kept open source
- the code is not yet compilable neither by TP nor FPC as units are still missing
- it is not yet sure that all required file are included
- the readme is the original readme file by Joe Merten