Added new distributer of the buyers (TrueWeighted).

It achieves to improve the result of a randomized distribution.
Moreover, it combats the strategies based on the size of the auctions.
Refactored TrueWeightedAuctionBoard.
Bug fixed in TrueWeightedAuctionBoard.

The array containing the more demanding loads is not necessary in some
cases.
Minor change in TrueWeightedAuctionBoard.

There is not need to catch the exception in the construction of the
array of the more demanding consumers.