Cleanup tasks
* Cleaned up logging (Fixes #21)
* Removed the non-functioning entry-screen (and the need for group.member).
* Added support for .radius on onIsland challenges
* Added support for subItemtype in onIsland challenges (i.e. 24:2:12 will match 12 smooth sandstone).
* Made the "reset" on challenges occur when the time runs out, instead of when completing a challenge (untested)