PlayerData will now reset to 0 if ever found to be less than 0,by giving the player accrued blocks such that the remaining count is 0. No doubt this will cause some users even more problems. Also added adjustaccruedclaimblocks command to adjust the accrued total. Doesn't work with permissions, though.
Resolves some further issues surrounding PvP logging and item dupes, hopefully. getRemainingClaimBlocks() will give a player enough accrued claimblocks to reset them to zero if it tries to return a value less than zero.