Explanation of config options
Can some explain what these config options do please. 

LocationRadius
TeleportNearDefaultDistance
AllowCraft
CheckValidOnList 
BlockedItems
LocationRadius: Honestly not sure.  It is used by several commands I haven't actually used, myself, (/sethome and /tpsave)

TeleportNearDefaultDistance: distance the admin will teleport from player when using /tpn PLAYER.  This can be used instead of /tp Player, usually only by admins.

AllowCraft: For each of home, town, and tpr commands, decides whether or not a player can be crafting while using those commands.

CheckValidOnList: Not sure, used only by /listhomes.

BlockedItems: Blocks use of teleport commands while carrying items listed here.  For example, if you want to block teleports for some player carrying an M249, you could add that here.  I have also never used this.