Added transaction-log querying in-game!
Pending notifications now persist after a server reboot!
Notification system now consolidates messages having the same
shop+player+item+action.
Fixed logging for transactions with a shop you own/manage: Total cost
is now correctly recorded as zero and these actions no longer generate
notifications for the player who did them.  
Made brick related item names more unique, distinguishing regular clay
bricks from stone/nether bricks, and distinguishing individual bricks
from blocks.
Fixed carrot being detected as Rotten Flesh
Fixed Poison Potato being detected as Posion Potion (base wordform for
all potions changed from "pot" to "poti")
Removed support for old "shop file" format. It only worked for files
from LS3 which is ancient now.
Put MultiDB lib under CommandShops package so it can be embedded in
other plugins without conflict