Added high-res versions of NETRICSA messages.

Made it so that the game takes away all of the player's guns and ammo when he transitions into "The Dark Island" level, like what NETRICSA said that happened.
Also replaced the thumbnail images with better quality ones.

Added the prequel level, Marsh Wastes. I edited it so that it transitions into The Dark Island, so you can start playing from it.

Recompiled the levels. Now the placed weapons shouldn't look funny.
Coloured the level names red so that they would stand out in the list.

Removed the original TSE version from the .gro file.
Put the original Readme in the base folder.

Initial upload.